Free Science Calculators
Physics, chemistry, weather, and scientific measurement calculators. All tools are free, accurate, and require no account.
Voltage Drop Calculator
Calculate voltage drop across a wire based on length, gauge, and current.
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Science Tools
16 calculatorsVoltage Drop Calculator
Calculate voltage drop across a wire based on length, gauge, and current.
Ohms Law Calculator
Calculate voltage, current, resistance, or power using Ohm's law.
Resistor Calculator
Decode resistor color bands and calculate series/parallel resistance.
Horsepower Calculator
Calculate horsepower from torque and RPM or convert between power units.
Engine Horsepower Calculator
Estimate engine horsepower based on quarter-mile time and vehicle weight.
BTU Calculator
Calculate BTU requirements for heating or cooling a room based on its size.
Density Calculator
Calculate density, mass, or volume given any two of the three values.
Speed Calculator
Calculate speed, distance, or time using the speed-distance-time formula.
Molarity Calculator
Calculate molarity, moles, or volume for chemical solution preparation.
Molecular Weight Calculator
Calculate the molecular weight of any chemical formula from atomic masses.
Electricity Calculator
Calculate electricity cost based on wattage, usage hours, and rate per kWh.
Wind Chill Calculator
Calculate the wind chill temperature based on air temperature and wind speed.
Heat Index Calculator
Calculate the heat index from temperature and relative humidity.
Dew Point Calculator
Calculate the dew point temperature from air temperature and humidity.
Mass Calculator
Calculate mass from density and volume or convert between mass units.
Weight Calculator
Convert weight between units and calculate weight on different planets.
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We cover all major calculator categories for your everyday needs.
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Mortgage Calculator
Calculate your monthly mortgage payment, total interest, and amortization schedule.
Amortization Calculator
See your full loan amortization schedule with principal and interest breakdown by month.
Loan Calculator
Estimate monthly payments and total cost for any personal or auto loan.
Car Payment Calculator
Calculate your monthly car payment and total loan cost based on price, rate, and term.