Here you can find pre-built calculation and design templates from all kinds of different disciplines and areas. You can use them as is or duplicate them into your own workspaces and make them your own!

Templates

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Energy Optimisation Calculator

Electricity Bill Calculator

Electrical Engineering

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Welcome! This page will assist you in calculating power in a circuit by inputting values for voltage and current. 

This can either calculate the total power in a circuit or the power dissipation of particular electrical components. 

Power is the rate of electrical energy transfer per unit of time. It is a fundamental principle in electrical analysis. 

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DC Power Circuit Calculator

Effortlessly calculate DC power circuits on CalcTree. Free-to-use DC power circuits calculator. Optimize your electrical designs. Try it now!

Welcome! This page will use Ohm's Law to calculate voltage in a circuit given current and resistance. 

Our ohms to volts calculator can be used to find component-specific voltages or total voltage in a circuit assuming a DC source. 

Ohm's law is the foundation of electrical analysis and, thus, incredibly useful for circuit design.

Ohm's law describes the relationship between voltage, current and resistance. A larger current and resistance give rise to a larger voltage. However, a larger resistance reduces the total current if the voltage is constant. 

Ohm's Law To Calculate Voltage In a Circuit

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Ohm's Law Calculator | Ohms to Volts Calculator

Welcome to the inductive reactance calculator! This page will use frequency and inductance input parameters to provide a reactance value. Reactance is a property of AC circuit components (inductors and capacitors) that is similar to resistance. The difference is that while resistance opposes the current flow, reactance opposes the change in the current flow. 

When provided with an AC voltage, an inductor will produce a reactance. This reactance depends on the AC source frequency and the inductance value. 

Inductive Reactance Calculator 

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Inductive Reactance Calculator

Welcome! This page will use the frequency of an AC source and the capacitance value of a capacitor to calculate its reactance. Reactance is an important property of capacitors and inductors that arises due to the changing direction of the current flow in AC circuits. 

Reactance is similar to resistance, with the difference being that resistance describes the opposition to the flow of current, while reactance describes the opposition to the change in the currenRelat (which is the case in AC circuits). Let's begin! 

When provided with an AC voltage, a capacitor will produce a reactance. This reactance depends on the AC source frequency and the capacitance value.

Capacitive Reactance Calculator

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Welcome to our full load current calculator!

For the calculation the full load current of a device or circuit, you will need to know the following information:

The full load current is the amount of current that a device or electrical circuit is rated to carry continuously without overheating or damaging the conductors. Knowing the full load current of a device or circuit is important to properly size the conductors, overcurrent protection devices, and power supply.

Full Load Current Calculator

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Welcome! This calculation is for the generator fault current given a generator power rating, rated voltage, and impedance in base percentage. 

Fault currents can occur in a circuit due for several reasons. Knowing this value can provide valuable information for rectifying and diagnosing problems in a circuit. As well as helping you to make appropriate design choices for electrical components.

Fault currents occur as a result of low-impedance short circuits. As a generator is an electrical machine, it can occur when a short to ground is created, phases are crossed or other similar scenarios. The magnitude of the generator fault current depends on several technical specifications.

Generator Fault Current Calculator 

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Generator Fault Current Calculator

Welcome! Calculation of the generator load current is an important task that ensures that your generator runs at an optimal level and is not overloaded. This is important for maintaining the safety and efficiency of your generator system.

This page will enable you to calculate the generator load current using the following:

The generator load current is the amount of electrical current being drawn from a generator at a given moment. It is typically measured in amperes (A) and is a key factor in determining the efficiency and safety of a generator system.

The load current of a generator is directly related to the power output of the generator. The higher the load current, the more power the generator produces. However, if the load current becomes too high, it can cause the generator to become overloaded, which can lead to reduced efficiency, overheating, and even damage to the generator.

Generator Load Current Calculator

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Welcome! This page is about the calculation the primary and secondary current of a single or 3 phase transformer and the turns ratio. The key parameters required for calculation will be:

The transformer is a device that transfers electrical energy from one circuit to another through electromagnetic induction. The transformer relies on the principles of Faraday's Law of Electromagnetic Induction, which states that the voltage induced in a conductor is proportional to the rate of change of the magnetic field. We will calculate a transformer's full load current and turns ratio in this template.

The full load current of a transformer is the amount of current that the transformer can carry under normal operating conditions. It is an important parameter to consider when designing a transformer as it determines the conductor's size needed to carry the current.

The turns ratio of a transformer is the ratio of the number of turns of wire on the primary winding of the transformer to the number of turns on the secondary winding. It is an important parameter to consider as it determines the voltage transformation the transformer can perform.

Transformer Full Load Current and Turns Ratio Calculator 

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Welcome to our transformer short circuit calculation! This page will allow you to undertake a transformer short circuit current calculation using the transformer rating in kVa, the voltage rating of the secondary winding and the per unit impedance of the transformer in percentage. Let's begin! 

In a transformer, fault current refers to the amount of current that flows through the transformer when there is a fault or short circuit in the system. This current can be much higher than the normal operating current of the transformer. It can cause damage to the transformer and other electrical equipment if it is not properly protected.

Several types of fault conditions can occur in a transformer, such as a short circuit between the primary and secondary windings, a short circuit between the windings and the transformer's core, or an external short circuit on the secondary side of the transformer. Each of these fault conditions can result in a different fault current magnitude and waveform.

💡Understanding and analysing these fault currents is important to properly design and protect the transformer and the electrical system.

Transformer Short Circuit Calculation

Effortlessly calculate current fault for transformers on CalcTree. Free-to-use Current Fault Calculator. Try it now!

Transformer Fault Current Calculator Online | Transformer Short Circuit Calculation

Welcome to our load fault current calculator! This page about the calculation of the fault current through the cable to a load given:

Short circuit fault current is the amount of current that flows through a circuit when a short circuit occurs. It is an important factor to consider in electrical engineering, as it determines the size of protective devices such as circuit breakers and fuses.

When a short circuit occurs, the resistance in the circuit drops to nearly zero, causing the current to increase significantly. The short circuit fault current is the maximum current that will flow through the circuit at the point of the fault. Calculating the short circuit fault current is important to ensure that the protective devices are properly sized to handle the high current.

Short Circuit Current Calculation For Cable AS/NZS 3008 

Calculate short circuit fault current for cables on CalcTree. Free-to-use Short Circuit Fault Current Calculator. Try it now!

This calculator will allow you to determine an appropriate battery size in Amp-hours given load, supplied voltage, duration, battery type and charge. 

Choosing the most appropriate battery for a circuit is a critical choice in designing a selected circuit. The type of battery also plays a crucial part in implementing this. 

The most important specification of a battery is its current rating. The rated capacity of any battery expresses the average amount of current it releases over a period of time under normal use. For example, a 4000Ah battery can deliver 100 A for 40 hours. 

The type of battery selected also plays an important role in battery size. Lead-acid batteries have a battery rating proportional to their discharge rate. 

Battery Capacity Calculator

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Battery Capacity Calculator | Battery Size Calculator

Welcome to our 3-Phase Power calculation template! This page will enable you to calculate a power value for real, apparent and reactive power in kW, kVA and kVAR units. You will need to know either the line voltage or phase voltage, the phase current/line current and the power factor. Let's begin!  

Three-phase power is a common electrical power transmission method used for high-power applications, such as in power plants, factories, and commercial and residential buildings. In a three-phase system, three alternating current (AC) voltages are generated with a fixed phase difference of 120 degrees between them and are transmitted along three separate conductors. Three-phase systems have several advantages over single-phase systems, including more efficient power transmission, reduced transmission losses, and reduced cost of electrical equipment.

3-Phase Power Calculator

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3 Phase Power Calculator

Welcome to our cable voltage drop calculator! This page operates as both an AC and DC voltage drop calculator and will enable you to calculate the voltage drop across a length of wire using a specified input voltage, rated load current and distance.

Voltage drop due to wires is an important parameter in the design of electrical circuits, especially in high-voltage systems. Controlling and anticipating this voltage drop is essential for building safe and efficient electrical systems. 

Voltage drop is defined as the amount of voltage reduction in an electrical circuit due to resistance. This resistance can be in the form of electrical components such as resistors, inductors or capacitors, but it can also occur due to the electricity carrying wire's internal resistance. 

The voltage drop due to the conductor wire's internal resistance can be calculated as follows: 

Wire Voltage Drop Calculator to AS/NZS 3008

Calculate wire voltage drop on CalcTree. Free-to-use Wire Voltage Drop Calculator. Optimize electrical circuit designs. Try it now!

Wire Voltage Drop Calculator -  AS/NZS 3008

Welcome to our electric motor RPM calculator! This page will allow you to calculate the motor speed of an AC induction motor using the supply frequency and the number of pole pairs within the motor. 

Motor speed is an essential parameter in electric motor design. As such, it should be considered carefully. 

AC induction motor speed depends on the supply frequency and the number of pole pairs. To regulate the speed of an AC induction motor, one must vary these two variables to achieve the desired speed. There are also other methods of speed regulation: 

AC Induction Motor Speed Calculator 

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Electric AC Induction Motor RPM Calculator 

Welcome! This AC current calculation will allow you to calculate the full load current of an AC induction motor. It will utilise supply voltage, power rating, power factor, efficiency and the type of phase to calculate a current value in amps. Let's begin!

The full load motor current is the maximum amperage the induction motor windings are designed to draw given ideal conditions (determined by the manufacturer). 

AC Current Calculator (3Ph, 1Ph)

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AC Current Calculator (3Ph, 1Ph) 

Welcome! This page will allow you to perform an electric motor torque calculation using motor speed and specified power rating. Motor torque, speed and power are directly related and are some of the most important considerations when selecting a motor. 

Calculating the speed and torque will give you an important design parameter when selecting a motor. 

The torque output of a motor is the amount of rotational force that the motor develops. Torque is generated differently for different motors (DC, induction, synchronous). See the list below for an explanation of how torque is developed for each type of motor. 

Electric Motor Torque Calculator

Calculate the torque produced by an electric motor on CalcTree. Free-to-use Electric Motor Torque Calculator. Try it now.

Electric Motor Torque Calculator Online

Welcome! This arc flash calculation will allow you to obtain the arcing current value using a range of inputs, such as bolted short-circuit current, system voltage and conductor gap. 

Arc flashes occur when live wires are short-circuited. In the case of high-voltage systems such as those in generators, factories and power stations, this can prove extremely dangerous and hazardous to those in contact with the circuit. 

Arc flash is the current that flows across the air gap between two conducting wires. It can produce an extremely loud noise, pressure waves and temperatures depending on the voltage The value of the Arc Flash current (according to the 

 standard) can be calculated as follows: level involved. 

Arc Flash Calculator

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The calculation computes various parameters of an RLC circuit, which is an electrical circuit consisting of a resistor (R), an inductor (L) and a capacitor (C). These circuits are crucial in numerous applications, including radio receivers and filters.

 is composed of three fundamental components: a 

) which stores energy in its magnetic field, and a 

) which stores energy in its electric field. The combination of these elements in a circuit allows for a variety of responses to electrical inputs, including the ability to resonate at a specific frequency.

This calculator receives user input for resistance, capacitance, inductance, frequency and bandwidth of an RLC circuit. The calculator outputs the impedance, resonant frequency, phase angle and quality factor. You can visualize the workflow of the calculation provided in the toggle box below.  

The outputs of this calculator are discussed below.

) is the total opposition to current flow in an AC circuit and is given by:

) is the frequency at which the circuit's impedance is at its minimum, and where the circuit naturally oscillates with maximum amplitude. It is given by:

) is the phase difference between the total voltage and current and is given by:

) is a unitless parameter that quantifies the 'sharpness' of the resonance in a circuit, particularly in an RLC circuit. Resonance occurs at a specific frequency, known as the resonant frequency (

). The Quality Factor is a measure of how narrow or sharp this resonant peak is, and is given by:

The Quality Factor can be interpreted as follows: 

RLC circuits are found in a variety of applications, including:

RLC Circuit Calculator

This calculator computes various parameters of an RLC circuit, which is an electrical circuit consisting of a resistor, an inductor and a capacitor.

This calculator computes the maximum demand of current based on the specific load group, its phase types and quantities for single unit households (a house, shed or individual living unit) based on the procedures provided in the AS/NZ 3000 Wiring Manual.

You can only consider 10 different items. If you need to use less than 10 items, set the quantity values of unwanted rows to "0".

❗Note, if you choose "3 Phase", ensure to select the option "RWB".

Table

The output shown is the maximum demand required of each phase based on the inputs above. If you want to see the demand due to each load group, click the toggle below.

Demand

Table (6)

Maximum demand refers to a quantity of electricity that a system, circuit, or facility uses in a given amount of time. It represents the peak load or demand that the electrical system must have the capacity to manage. This concept is essential for electrical utilities since they must have enough capacity to handle their customer's peak demand without overloading or rupturing the system. 

How are the output values calculated for each load group?

This section provides an explanation about the methods used to calculate the output values for each specific load group. This is a summary of AS/NZ 3000-2018 - Table C1, Column 2.

Click on the specific load group to see how it has been calculated!

Maximum Demand Calculator to AS/NZS 3000

This calculator computes the maximum demand of current based on the specific load group, its phase types and quantities for single unit households.

This calculator simulates the energy consumption, production and cost implications of various setups including electric batteries, combined heat and power (CHP) systems, electric vehicle charging and renewable energy sources. It can be used for analysing and minimising operational costs in energy management systems. 

matplotImage

The purpose of the Energy Optimisation Calculator is to provide insights into how different variables affect the overall energy costs of a facility or system. 

Below are the key equations used in this calculator.

👉Note, costs are evaluated in $ and power in MWh.

This formula calculates the cost of fuel necessary for power generation, adjusted for the efficiency of the energy system. It underscores the direct relationship between fuel efficiency and operational expenditure.

This formula computes the expenditure incurred from consuming electricity, factoring in the variability of electricity prices over time. This equation is crucial for evaluating the financial impact of grid electricity usage.

 is the highest power requirement observed.

The focus of demand charge is on the additional costs incurred when electricity demand surpasses a predetermined threshold, emphasizing the importance of managing peak demand to avoid significant charges.

This cumulative equation consolidates all pertinent costs into a single metric, offering a comprehensive overview of the financial outlays associated with energy management within the specified simulation period.

Complex Objective Function Terms in Energy Optimization:

Mathematical Modeling for Energy Systems:

This calculator simulates the energy consumption, production and cost implications of various electrical setups including electric batteries.

Welcome to our electricity bill calculator! This page will allow you to calculate the specific energy cost of household appliances and electrical machines based on a given cents per kilowatt hour rate! We will provide you with a cost-per-week or monthly rate. 

Your electricity provider charges electricity based on a cents/kWh basis. Knowing how much money your appliances are costing you is an extremely useful piece of information! 

The cost of electricity in dollars per week can be calculated as follows: 

Calculate your electricity bill accurately on CalcTree. Free-to-use electricity bill calculator. Calculate your bill now!