Calculators
Eleven quick calculators for the workshop, yard and job site. Every formula is shown and sourced.
Calculator
Noise exposure calculator
How much of your safe daily noise dose a tool session uses.
Calculator
Two-stroke fuel mix calculator
Oil to add for 50:1, 40:1, 32:1 or 25:1.
Calculator
Ladder angle & size calculator
Base distance by the 4:1 rule, ladder length and duty rating.
Calculator
Extension cord voltage drop calculator
Voltage lost over a cord, and the gauge you need.
Calculator
Generator wattage calculator
Running plus starting watts for the things you want to power.
Calculator
Tool battery runtime calculator
Watt-hours and minutes of run time from V and Ah.
Calculator
Board feet calculator
Board feet and lumber cost for any number of boards.
Calculator
Saw blade rim speed calculator
Surface speed of a blade or wheel from diameter and RPM.
Calculator
Mowing time calculator
How long your lawn takes for a given deck width and speed.
Calculator
Air compressor CFM calculator
The CFM a compressor needs for the tools you run.
Calculator
Log splitter tonnage calculator
Splitting force from cylinder bore and pump pressure.