Other Calculators

GPA Calculator

Calculate your GPA for a semester or your cumulative GPA. Supports 4.0, letter grade, and percentage scales.

Grade Calculator

Calculate your final grade based on weighted assignments, tests, and exams. Find the grade you need on your final.

Dice Roller

Roll any number and type of dice: d4, d6, d8, d10, d12, d20, and custom sided dice.

Fuel Cost Calculator

Calculate trip, monthly, and annual fuel costs based on distance, MPG, and gas price.

Gas Mileage Calculator

Calculate MPG from odometer readings and gallons used. Estimate annual fuel costs at any MPG.

Wind Chill Calculator

Calculate wind chill temperature using the NWS formula. Includes frostbite risk time and wind chill reference table.

Heat Index Calculator

Calculate apparent temperature using the NWS Rothfusz formula. Shows heat disorder risk category.

Roman Numeral Converter

Convert between Arabic and Roman numerals with step-by-step breakdown. Supports 1 to 3999.

Password Generator

Generate secure random passwords with custom length and character sets. Shows entropy and estimated crack time.

Love Calculator

Calculate love compatibility between two names. A fun compatibility test for entertainment.

Golf Handicap Calculator

Calculate your Golf Handicap Index using the World Handicap System formula. Enter up to 20 rounds.

BTU Calculator

Convert BTU to watts, kWh, calories, and joules. Calculate recommended AC size for any room.

Voltage Drop Calculator

Calculate wire voltage drop by AWG gauge, current, and length. Checks NEC 3% recommendation.

Horsepower Calculator

Convert horsepower to watts and kW. Calculate HP from torque and RPM or from electrical power.

Mileage Calculator

Calculate MPG from odometer readings. Estimate trip cost and annual fuel expenses.

Subnet Calculator

Calculate network address, broadcast address, usable host range, and subnet mask from IP address and CIDR notation.

Electricity Cost Calculator

Calculate how much any appliance costs to run per day, month, and year based on wattage and your electricity rate.

Carbon Footprint Calculator

Estimate your annual carbon footprint from driving, flights, home energy, and heating. Compare to the US average of 16 tons CO2.

Batting Average Calculator

Calculate batting average, on-base percentage (OBP), slugging percentage (SLG), and OPS for any baseball player.

Mortgage Points Calculator

Calculate the break-even period for buying mortgage discount points. See if paying points saves money over your planned stay.

Payback Period Calculator

Calculate the payback period for any investment or capital expenditure. Includes discounted payback period and cumulative cash flow table.