Almighty Calculator

Precision tools for the trades, the shop, and the field. Free calculators with the formula and a worked example behind every answer.

Browse by trade

• Wood & WoodworkingBoard feet, log scale, firewood, wood movement, CNC.
  5 calculators
• Tree CareAppraisal, log weight, rigging loads.
  2 calculators
• ElectricalVoltage drop, conduit fill, RC circuits, solar sizing.
  8 calculators
• Plumbing & HVACFriction loss, pump head, gas pipe, duct, refrigerant.
  7 calculators
• Building & CarpentryRafters, retaining walls, R-value, snow load.
  5 calculators
• Metal & FabricationBend allowance, weld volume, bolt circles.
  2 calculators
• Mechanical & HydraulicCylinders, pulleys, sling angles.
  3 calculators
• Farm & RuralSprayer calibration, fertilizer blends, drain tile.
  1 calculator