Other Calculators
Everyday utilities: date and time math, construction materials, subnetting, passwords, unit conversion, school grades, and more — all free and private.
Date & Time
- Age CalculatorExact age in years, months, days, and totals.
- Date CalculatorDays between dates, or add and subtract time.
- Time CalculatorAdd, subtract, and sum durations.
- Hours CalculatorWeekly timecard with daily and weekly totals.
- Time Card CalculatorFill out a timecard and compute pay.
- Time Zone CalculatorCompare times across world time zones.
- Time Duration CalculatorDuration between two clock times.
- Day CounterCount days, weekdays, and weeks between dates.
- Day of the Week CalculatorWhat day of the week was any date?
Home & Construction
- Concrete CalculatorConcrete volume for slabs, footings, and columns.
- BTU CalculatorAir conditioner size for any room.
- Square Footage CalculatorFloor area of rooms and complex shapes.
- Stair CalculatorRiser, run, and stringer layout for stairs.
- Roofing CalculatorRoof area and bundles of shingles.
- Tile CalculatorHow many tiles a floor or wall needs.
- Mulch CalculatorMulch volume and bags for a bed.
- Gravel CalculatorGravel volume and weight for an area.
Utilities & Internet
- IP Subnet CalculatorIPv4 network details from an address and mask.
- Password GeneratorStrong random passwords with custom rules.
- Bandwidth CalculatorDownload times and needed bandwidth.
- Base64 Encode / DecodeConvert text to and from Base64.
- URL Encode / DecodePercent-encode and decode URLs.
Measurements
- Conversion CalculatorConvert length, weight, volume, temperature, and more.
- Density CalculatorMass, volume, or density from the other two.
- Mass CalculatorMass from weight or density and volume.
- Weight CalculatorWeight from mass on any planet.
- Speed CalculatorSpeed, distance, or time from the other two.
Everyday Life
- GPA CalculatorGrade point average across courses.
- Grade CalculatorWeighted grade and final exam target.
- Bra Size CalculatorBand and cup size from measurements.
- Shoe Size ConversionUS, UK, EU, and centimeter shoe sizes.
- Tip CalculatorTip and split a restaurant bill.
- Golf Handicap CalculatorCourse handicap from your index.
- Sleep CalculatorBedtimes that complete sleep cycles.
Entertainment
- Dice RollerRoll any number of dice with any sides.
- Love CalculatorA just-for-fun name compatibility score.
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