Other Calculators
The following is a complete list of our general utility, date/time, construction, and lifestyle calculators.
Date and Time
Age Calculator
Calculate exact age in years, months, weeks, days, hours, and minutes with next birthday countdown.
Date Calculator
Add or subtract days, weeks, months, or years from any date, or calculate elapsed days between two dates.
Time Calculator
Add and subtract hours, minutes, and seconds for flight schedules and media durations.
Hours Calculator
Calculate worked payroll hours, lunch break deductions, overtime, and gross earnings.
Time Card Calculator
Calculate weekly clock-in and clock-out hours for employee timesheets.
Time Zone Calculator
Convert time across worldwide international time zones and UTC offsets.
Time Duration Calculator
Calculate exact time duration between two dates and timestamps.
Day Counter
Count total calendar days, working business days, and weekends between two dates.
Day of the Week Calculator
Find which day of the week (Monday - Sunday) any historical or future date falls on.
Housing / Building
Concrete Calculator
Calculate cubic yards and premixed 60lb/80lb bags for slabs, footings, and cylindrical columns.
BTU Calculator
Calculate HVAC heating and air conditioning cooling BTU requirements by room square footage.
Square Footage Calculator
Calculate floor area in square feet and square meters with price-per-square-foot cost.
Stair Calculator
Calculate total stair rise, run, number of steps, stringer length, and incline angle.
Roofing Calculator
Calculate roofing squares, architectural shingles, bundles, and underlayment rolls.
Tile Calculator
Calculate floor and wall tile box count, grout bags, and cutting waste contingency.
Mulch Calculator
Calculate cubic yards and bags of mulch or garden soil required for landscape beds.
Gravel Calculator
Estimate tons and cubic yards of crushed gravel, stone, or aggregate.
All 50 Construction Calculators
Access our complete professional suite of material takeoff calculators.
Various Measurements & Units
Height Calculator
Predict child adult height using Mid-Parental Khamis-Roche method.
Conversion Calculator
Convert units of length, temperature, area, volume, mass, time, speed, pressure, and energy.
GDP Calculator
Calculate Gross Domestic Product using expenditure, income, and value-added models.
Density Calculator
Calculate mass, volume, or density (ρ = m/V) across scientific units.
Mass Calculator
Convert and calculate mass, weight, and molar mass values.
Weight Calculator
Convert between pounds, kilograms, stone, ounces, and grams.
Speed Calculator
Calculate speed, distance, or travel transit time (v = d/t).
Molarity Calculator
Calculate molar concentration, solute mass, and solution volume for laboratory chemistry.
Molecular Weight Calculator
Calculate molar mass (g/mol) from chemical empirical molecular formulas.
Roman Numeral Converter
Convert between standard Arabic numerals (1-3999) and Roman numerals (I, V, X, L, C, D, M).
Electronics & Circuits
Voltage Drop Calculator
Calculate circuit voltage loss and wire gauge sizing (AWG) for single and 3-phase circuits.
Resistor Calculator
Determine resistance value and tolerance from 4-band and 5-band color codes.
Ohms Law Calculator
Calculate voltage, current, resistance, and electrical power (V = IR, P = VI).
Electricity Calculator
Estimate appliance power consumption and kilowatt-hour (kWh) electric utility cost.
Internet & Web Tools
IP Subnet Calculator
Calculate IPv4 CIDR subnet masks, network address, broadcast address, and usable host IP ranges.
Password Generator
Generate strong cryptographically secure passwords with custom length and character sets.
Bandwidth Calculator
Calculate file download and upload time based on network connection speed.
Base64 Encode / Decode
Encode plain text or binary data into Base64 format and decode Base64 strings.
URL Encode / Decode
Convert special characters to percent-encoded URI notation and decode URI query strings.
Everyday Utility
GPA Calculator
Calculate cumulative semester Grade Point Average on 4.0 weighted and unweighted scales.
Grade Calculator
Calculate course final grade based on weighted assignments, tests, and final exam score.
Bra Size Calculator
Calculate correct band and cup size from ribcage and bust measurements.
Shoe Size Conversion
Convert international shoe sizes across US, UK, European, and Japanese centimeter standards.
Tip Calculator
Calculate restaurant bill tip percentage and split total check evenly among party members.
Golf Handicap Calculator
Calculate World Handicap System (WHS) index from course ratings and score differentials.
Sleep Calculator
Calculate optimal bedtimes and wake times based on natural 90-minute REM sleep cycles.
Fuel Cost Calculator
Calculate gas trip costs based on distance, vehicle MPG, and fuel price per gallon.
Gas Mileage Calculator
Calculate fuel economy in miles per gallon (MPG) and liters per 100km (L/100km).
Dice Roller
Roll virtual polyhedral dice (d4, d6, d8, d10, d12, d20, d100) for tabletop games.
Love Calculator
Fun compatibility score generator based on traditional relationship horoscope algorithms.