Home Energy Audit Calculator
Compare home energy upgrades by cost, annual saving and payback, and see the combined effect of doing them all.
Read moreFree tools
Calculators
The sums that come up often enough to be worth a page.
- 451 items
Solar Panel ROI Calculator
Calculate solar panel system cost, annual savings, payback period and lifetime return, with panel degradation and rising…
Read moreLED Retrofit Savings Calculator
Calculate annual energy and cost savings, payback period, ROI and carbon reduction from replacing fixtures with LEDs.
Read morePlumbing Job Pricing Calculator
Set a flat-rate price for a plumbing job from labour hours, billable rate, parts and markup, and see the gross margin.
Read moreDrain Slope Calculator
Calculate the total drop and percentage grade for a drain pipe from its length and slope, and check common minimum slopes.
Read morePipe Size and Flow Rate Calculator
Calculate water velocity and friction pressure loss in copper pipe sizes for a flow rate, and the smallest size within a…
Read moreBoiler Sizing Calculator
Estimate boiler output needed for space heating from heat loss, and for instant hot water from flow and temperature rise.
Read moreRefrigerant Line Set Charge Calculator
Calculate the additional refrigerant needed for a line set longer than the factory charge allows.
Read moreHVAC Replacement Cost Estimator
Estimate the cost of replacing a heating and cooling system from equipment, labour, ductwork, permits, extras and rebates.
Read moreHVAC Load Calculator
Estimate the cooling or heating load in BTU per hour and air conditioner tonnage from area, climate, insulation and occupancy.
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Let’s build something worth finding.
Tell us where you want the business to be in twelve months. We will come back with a costed plan, a realistic timeline, and the numbers we expect to move — no obligation, no jargon.
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