All Free Online Calculators
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Estimate what a baby costs in the first twelve months.
Income received during leave and the gap compared with your salary.
Extra daily calories while nursing on top of your usual intake.
Average daily and weekly weight gain since birth.
Pressure altitude and density altitude from elevation, QNH, and temperature.
Split wind into crosswind and headwind parts for a runway.
True airspeed from calibrated airspeed, pressure altitude, and temperature.
Where to start descending for a chosen descent angle.
Heading to fly and groundspeed with a crosswind.
Trip fuel, reserve, and total fuel for a flight.
Total weight, moment, and center of gravity of a loaded aircraft.
How far an aircraft can glide from a given height.
Climb rate needed for a published climb gradient.
Estimate the cloud base from temperature and dew point.
Bank angle, turn radius, and stall speed in a coordinated turn.
Maximum displacement speed of a boat from its waterline length.
How much anchor line and chain to let out for a safe scope.
Estimate the tide height at any time between low and high water.
Compare real boat speed with the theoretical speed of the propeller.
Range and endurance of a boat while keeping a fuel reserve.
Rate how powered-up a sailboat is from sail area and weight.
Rate a boat as light, moderate, or heavy for its waterline length.
How far you can see over water, and when a light or landmark appears.
Check if your mast fits under a bridge at the current tide level.
Rule of thumb for the number of people a small boat can carry.
Speed over the ground and arrival time with a fair or foul current.
Seeds to plant per acre after germination and field losses.
Bushels and tons a round grain bin holds.
Pounds of feed per pound of gain, with the feed cost of that gain.
How many animals a pasture can carry for a grazing season.