Gauges
Small calculators for the jobs that come round every year: boiling sap, buying firewood, reading a radon report, clearing a roof, shocking a well. Each one shows its formula and works in the browser.
Sap to syrup calculator
How much maple sap makes a gallon of syrup, and how long the boil takes.
Firewood cord calculator
Turn a stack’s length, height and depth into full cords and face cords.
Radon unit converter
pCi/L, Bq/m³ and working levels side by side, with published reference levels.
Roof snow load calculator
How much the snow on a roof weighs, from its depth and how wet it is.
Well shock chlorination calculator
Gallons standing in a drilled well and the bleach for a shock treatment.
Latitude/longitude and UTM converter
Convert GPS positions between decimal degrees and UTM for maps and field notes.