Other Calculators

More than just years - calculate your exact age down to the second! Find out what day you were born, days until your next birthday, and fun age facts.

Calculate concrete volume, materials, and costs for your construction project. Includes mix design, curing timeline, and project planning tools.

Calculate work hours, overtime, and pay from time clock entries. Track daily hours, calculate overtime pay, and manage multiple time entries with our free time tracking calculator.

Simplify payroll with automatic overtime calculations. Track multiple weeks, handle breaks, night shifts, and export timesheets. Perfect for freelancers and HR departments.

Calculate network bandwidth requirements and data transfer rates.

Estimate battery runtime in hours from capacity (mAh or Wh) and device current draw.

Calculate bra size based on measurements and sizing charts.

Calculate BTU requirements for heating and cooling systems.

Estimate your annual carbon footprint from transportation, home energy, and lifestyle, with tips to reduce emissions.

Estimate carpet needed for a room in square yards or meters, including padding and waste allowance, with cost estimates.

Calculate concrete volume, bags needed, and material costs for projects.

Convert between various units of measurement and currencies.

Calculate file transfer time for any bandwidth in Mbps, Gbps, or MB/s. Plan downloads, uploads, and data migrations.

Calculate differences between dates and add/subtract days from dates.

Count days between dates and calculate day numbers.

Find what day of the week any date falls on.

Calculate density using mass and volume for physics and chemistry.

Calculate dew point temperature from humidity and temperature.

Roll virtual dice with various sides for games and probability.

Calculate drywall sheets and screws needed by wall and ceiling area, with waste factor and 4x8 or 4x12 board sizes.

Calculate electrical power, energy consumption, and utility costs.

Calculate electricity costs from kWh usage and your local rate, with appliance-by-appliance cost breakdowns.

Calculate engine horsepower based on displacement, RPM, and efficiency.

Calculate flooring needed in square feet or meters across multiple rooms, with waste factor for hardwood, tile, vinyl, and laminate.

Calculate fuel costs for trips based on distance, MPG, and gas prices.

Calculate fuel efficiency, MPG, and gas consumption for vehicles.

Calculate Gross Domestic Product and economic indicators.

Calculate golf handicap index and course handicap for golfers.

Calculate GPA (Grade Point Average) for high school and college students.

Calculate final grades, weighted grades, and grade requirements.

Calculate gravel needed for driveways, paths, and construction projects.

Calculate heat index and apparent temperature in hot weather.

Calculate horsepower, torque, and engine power specifications.

Calculate hours worked, time differences, and hourly calculations.

Estimate download and upload speeds, convert Mbps to MB/s, and check what bandwidth your online activities need.

Calculate IP subnets, CIDR notation, and network addressing.

Fun love compatibility calculator based on names and birthdates.

Calculate mass using density and volume or force and acceleration.

Calculate mileage, travel distance, and reimbursement for business travel.

Calculate molarity, moles, and solution concentrations for chemistry.

Calculate molecular weight and molar mass of chemical compounds.

Calculate mulch needed for landscaping projects by area and depth.

Calculate voltage, current, resistance, and power using Ohms Law.

Estimate paint needed in gallons or liters from wall area, number of coats, and coverage rate, accounting for doors and windows.

Generate secure passwords with customizable length and character sets.

Estimate how long a brute-force attack would take to crack your password, with entropy in bits and strength recommendations.

Calculate swimming pool volume in gallons or liters for rectangular, round, and oval pools.

Calculate resistor values, color codes, and electrical resistance.

Convert between Arabic numbers and Roman numerals.

Calculate roofing materials, shingles needed, and roofing costs.

Convert uptime percentages (99.9%, 99.99%) into allowed downtime per day, month, and year for SLA planning.

Convert shoe sizes between US, UK, EU, and other international standards.

Calculate optimal sleep and wake times based on sleep cycles.

Size a solar panel system from your monthly electricity usage. Estimate panels needed, system cost, payback period, and savings.

Calculate speed, velocity, and convert between speed units.

Calculate square footage of rooms, houses, and irregular shapes.

Calculate stair dimensions, rise, run, and building code compliance.

Calculate theoretical yield, percent yield, and limiting reactants for chemical reactions.

Calculate tiles needed for flooring and wall projects with waste factor.

Add, subtract, and calculate time durations in hours, minutes, and seconds.

Calculate work hours, overtime, and payroll from time cards.

Calculate time duration between two times or dates.

Convert time between different time zones around the world.

Calculate tips, split bills, and total costs for restaurant dining.

Calculate tire dimensions, plus sizing, and tire comparisons.

Convert between units of length, weight, temperature, volume, area, and speed.

Calculate voltage drop in electrical circuits and wire sizing.

Calculate weight and convert between different weight units.

Calculate wind chill temperature and apparent temperature.

Calculate the correct wire gauge for electrical circuits using ampacity, voltage drop, and NEC guidelines.