Free calculators
Electrical calculators
Ohm's law, load, wire sizing, voltage drop and energy cost.
51 calculators
Electrical Job Profit
Test whether one electrical quote covers its crew time, materials, permits and allocated overhead before committing the job..
Ohm's Law Calculator
Check the relationship between voltage, current and resistance in a simple resistive circuit before interpreting a power reading..
Watt Calculator
Separate real power from apparent power when comparing a single-phase or balanced three-phase electrical load..
Amp Calculator
Estimate running current from electrical input power, then inspect how the continuous-load selection changes the planning current..
Voltage Calculator
Reconcile a resistive circuit's voltage using power and current, or current and resistance, without mistaking a nearby standard voltage for a measurement..
Voltage Drop Calculator
Compare conductor voltage loss across single-phase and three-phase runs using the actual route length and expected load..
Wire Size Calculator
Compare the conductor suggested by a simplified ampacity table with the larger size a chosen voltage-drop target may require..
Breaker Size Calculator
Compare a watts-based load estimate with a standard breaker lookup while separating operating current from the tool's design allowance..
Electrical Load Calculator
Build an early dwelling-load estimate from floor area and major appliances, then identify what a formal service calculation still needs..
kWh Calculator
Turn measured or estimated operating watts into energy use over a defined schedule and equipment count..
Electricity Cost
Budget the operating cost of an appliance from its power draw, daily schedule and a supplied electricity rate..
Generator Size Calculator
Sketch a backup-power requirement from running load and one starting surge before specifying a generator system..
Wire Size
Review a preliminary conductor gauge alongside the gauge indicated by this tool's fixed voltage-drop comparison..
Breaker Size
Explore a preliminary breaker lookup from an entered current or a simple watts-to-current conversion..
Amps to Watts
Translate a stated input current into DC or AC power while keeping electrical input separate from mechanical output..
Watts to Amps
Compare the current implied by a power requirement across DC, single-phase and balanced three-phase supply assumptions..
Ohm's Law
Explore the available resistive-circuit equations and check whether the input pair supports the quantity you want to solve..
Voltage Drop
Estimate voltage loss on a fixed conductor and inspect the longest run indicated by the tool's comparison threshold..
Wire Ampacity
Inspect how ambient temperature and conductor grouping reduce a simplified table ampacity before a full installation review..
Electricity Cost
The running cost of a circuit or appliance, worked from whichever figures you actually have: a nameplate, a clamp meter reading, or a wattage..
Electrical Repair Cost
Build a panel-work allowance from a defined replacement scope, including crew attendance and the equipment being supplied..
Electrical Repair Cost
Price a defined rewiring scope around access, occupied-room constraints and the time needed to restore circuits..
Electrical Net Profit
Review the combined operating result of an electrical business after direct delivery costs and company overhead..
Electrical Repair Revenue
Project revenue from one electrical work stream, then test the whole-business total implied by its assumed share..
Electrical Break-Even
Estimate how many electrical jobs must contribute enough gross profit to cover monthly fixed costs..
Electrical Overhead
Assemble the monthly cost of keeping an electrical contracting business ready to work before assigning it to prices..
Electrical Overhead
Translate an electrical company's overhead budget into a share of revenue for pricing and scenario comparisons..
Electrical Payroll
Budget a crew's wages, overtime and entered labour burden without confusing paid hours with hours sold..
Electrical Productivity
Use billed hours as a narrow productivity indicator, then investigate what prevents completed electrical work from reaching an invoice..
Electrical Productivity
Check how much of an electrician team's paid capacity is committed to billable work before changing staffing..
Electrical Acquisition Cost
Measure the cost of winning a new electrical customer and compare it with gross profit from the first completed job..
Electrical Customer Value
Estimate relationship gross profit from repeat electrical work, retention and an explicit referral assumption..
Electrical Lead Value
Put an expected gross-profit value on an electrical enquiry before setting a lead-buying allowance..
Electrical Close Rate
Test the revenue effect of winning more electrical quotations from a defined set of issued proposals..
Electrical Conversion Rate
Locate the largest recorded drop between an electrical enquiry, a response, an appointment and a paid job..
Electrical Average Ticket
Track revenue per completed electrical job and test a proposed change in the average invoice..
Revenue Per Tech
Relate an electrical team's monthly sales to headcount, then inspect the contribution assumptions behind the headline ratio..
Electrical Recurring Revenue
Test whether a defined electrical service agreement pays for its promised visits before allowing for additional authorized work..
Electrical Repair Revenue
Project a maintenance work stream from completed visits and invoice value, keeping scheduled tasks separate from repair sales..
Electrical Repair Revenue
Estimate repair sales and gross contribution from completed electrical faults and remedial jobs..
Electrical Repair Revenue
Model installation revenue from completed electrical projects and their average value before checking backlog and crew capacity..
Electrical Markup
Convert the landed cost of electrical parts into a selling price and see the margin that markup actually produces..
Electrical Markup
Apply markup to a defined electrical labour cost and inspect the resulting selling price and margin..
Electrical Gross Profit
Measure what electrical sales leave after direct labour, materials and other job costs, before company overhead..
Electrical Net Profit
Reconcile an electrical trading period from sales through direct costs to the surplus after entered overhead..
Electrical Cash Flow
Estimate the funding tied up while electrical customers pay later than the business pays its costs..
Electrical Pricing
Calculate an electrical selling price that recovers direct cost, a revenue-based overhead allowance and the chosen profit target..
Electrical Productivity
Value billed-time gaps in an electrical service team before reviewing appointment assignment and job readiness..
Electrical Productivity
Estimate the billable-time opportunity associated with an electrical service route, using your own before-and-after hours..
Electrical Gross Profit
Check the direct contribution of electrical service calls after diagnostic time, supplied parts and return attendance..
Electrical Recurring Revenue
Review the economics of an electrical agreement book, including retention and separately assumed work beyond the annual fee..
Beyond the numbers
Tools that produce something you can send
Invoice Generator
Build a clean, itemised invoice and print it to PDF.
Open toolEstimate Generator
Turn a scope of work into a priced estimate the customer can approve.
Open toolWork Order Generator
Write the job down before the technician leaves: what, where, who, and what they need to take with them..
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