Other Calculators Calculators
Date & time duration, construction materials, unit converters, circuit electronics, internet tools, and everyday utilities.
Date and Time
Age calculations, timesheets, time zones, duration between dates, and day counters.
Age Calculator
Calculate your exact age in years, months, days, total hours, minutes, seconds, and countdown to your next birthday.
Date Calculator
Add or subtract days, weeks, months, or years from any date to find the future or past target calendar date.
Time Calculator
Add, subtract, and convert time durations in hours, minutes, and seconds (HH:MM:SS).
Hours Calculator
Calculate total hours worked between start time and end time minus unpaid meal break deductions.
Time Card Calculator
Weekly timesheet calculator: calculate total regular hours, overtime hours (over 40h), and gross wages for 7 days.
Time Zone Calculator
Convert meeting times across global time zones (UTC, EST, CST, MST, PST, GMT, CET, IST, JST, AEST).
Time Duration Calculator
Calculate exact time elapsed between two timestamps in hours, minutes, and seconds.
Day Counter
Count total calendar days, business working days (excluding weekends), and weeks between two dates.
Day of the Week Calculator
Find which day of the week (Monday - Sunday) any past or future historical date falls on with leap year details.
Housing / Building
Concrete volume, BTU air conditioning, square footage, stairs, roofing, and tile estimators.
Concrete Calculator
Calculate concrete volume in cubic yards and determine how many 60-lb or 80-lb premix bags you need for slabs, footings, or posts.
BTU Calculator
Calculate required heating and air conditioning cooling BTU capacity for room square footage, ceiling height, and insulation.
Square Footage Calculator
Calculate total square footage (sq ft) and square meters (m²) across multiple rooms with material cost estimators.
Stair Calculator
Calculate number of steps, individual riser height, tread run, stringer length, and incline angle per building code.
Roofing Calculator
Estimate roof surface area with roof pitch multiplier, roofing squares (100 sq ft), and number of shingle bundles needed.
Tile Calculator
Calculate number of tiles and tile boxes needed for floor or wall tile installation with waste allowance and grout spacing.
Mulch Calculator
Calculate cubic yards of bulk garden mulch or number of 2 cu ft and 3 cu ft bags needed for garden bed coverage.
Gravel Calculator
Calculate cubic yards and US tons / metric tons of crushed stone, gravel, and aggregate for driveways and paths.
Various Measurements / Units
Universal unit conversion, speed, density, molarity, molecular weight, and Roman numerals.
Height Calculator
Convert height between feet/inches and centimeters, and view height percentile rankings by gender.
Conversion Calculator
Universal unit converter: length, weight, volume, temperature, speed, area, pressure, energy, and digital data storage.
GDP Calculator
Calculate Gross Domestic Product (GDP) using the expenditure approach: GDP = C + I + G + (X - M), plus GDP per capita.
Density Calculator
Calculate mass density: ρ = m / V with preset substance densities (water, steel, gold, air, concrete).
Mass Calculator
Convert between metric mass units (kg, g, mg, metric ton) and imperial units (lbs, oz, stones, US ton).
Weight on Other Planets Calculator
Calculate your exact weight on the Moon, Mars, Jupiter, Venus, Saturn, and other solar system celestial bodies.
Speed Calculator
Calculate speed, distance, or travel time: v = d / t across mph, km/h, meters/second, knots, and Mach.
Molarity Calculator
Calculate molar concentration (M = moles/L), solute mass in grams, and dilution volumes for chemistry lab solutions.
Molecular Weight Calculator
Parse chemical formulas (e.g., H2O, C6H12O6, NaCl, H2SO4) and calculate total molar mass in g/mol with elemental composition percentages.
Roman Numeral Converter
Convert Arabic integers (1 to 3,999) to Roman Numerals (I to MMMCMXCIX) and decode Roman Numerals back to numbers.
Electronics / Circuits
Ohm's Law, voltage drop, resistor color codes, and electrical appliance power costs.
Voltage Drop Calculator
Calculate wire voltage drop percentage and terminal voltage for copper and aluminum conductors according to NEC guidelines.
Resistor Color Code Calculator
Decode 4-band and 5-band through-hole resistor color stripes to find resistance value (Ω, kΩ, MΩ) and tolerance %.
Ohm's Law Calculator
Solve for Voltage (V), Current (I), Resistance (R), and Electric Power (P): V = I * R and P = V * I.
Electricity Cost Calculator
Calculate daily, monthly, and yearly electricity costs of home appliances based on wattage and kWh electricity rates.
Internet
IP subnet calculator, password generator, network bandwidth, Base64, and URL encoder.
IP Subnet Calculator
Calculate IPv4 subnet masks, CIDR network prefixes (/24), broadcast addresses, usable host ranges, and total host capacity.
Password Generator
Generate cryptographically secure random passwords with customizable length, symbols, numbers, and entropy bits scoring.
Bandwidth Calculator
Calculate download and upload transfer durations for files of any size over various internet speeds (Mbps, Gbps).
Base64 Encode/Decode
Encode plain text to Base64 and decode Base64 strings back to UTF-8 text with instant copying.
URL Encode/Decode
Percent-encode and decode URLs and URI query parameters compliant with RFC 3986.
Everyday Utility
College GPA, grade needed on final exam, tip splitting, shoe sizing, and sleep cycles.
GPA Calculator
Calculate cumulative high school or college GPA on a standard 4.0 scale with course credit weights.
Grade Calculator
Calculate current class grade and find the minimum score you need on your final exam to achieve your target letter grade.
Bra Size Calculator
Calculate accurate US and UK bra band and cup sizes from snug underbust and standing/leaning bust measurements.
Shoe Size Conversion
Convert shoe sizes between US, UK, Europe (EU), Centimeters (CM), and Inches for Men, Women, and Kids.
Tip Calculator
Calculate restaurant tip amounts (15%, 18%, 20%, 25%) and evenly split the final bill between dinner guests.
Golf Handicap Calculator
Calculate your World Handicap System (WHS) Score Differential and projected Golf Handicap Index from 18-hole rounds.
Sleep Calculator
Calculate optimal bedtimes and wake times based on natural 90-minute human sleep cycles and 15-minute fall-asleep buffer.
Weather
Wind chill index, feels-like heat index, and atmospheric dew point.
Wind Chill Calculator
Calculate feels-like Wind Chill temperature index using the National Weather Service (NWS) formula for temperatures ≤ 50°F and wind speeds ≥ 3 mph.
Heat Index Calculator
Calculate the NOAA feels-like Heat Index and heat danger category from ambient air temperature and relative humidity.
Dew Point Calculator
Calculate atmospheric dew point temperature and human comfort level from air temperature and relative humidity.
Transportation
Fuel trip cost, gas mileage MPG, engine horsepower, and tire size comparison.
Fuel Cost Calculator
Calculate total gas cost for a road trip based on distance, vehicle fuel economy (MPG or L/100km), and gas price per gallon.
Gas Mileage Calculator
Calculate vehicle fuel efficiency in Miles Per Gallon (MPG) and Liters per 100km (L/100km) from odometer readings.
Horsepower Calculator
Calculate engine mechanical horsepower from torque (lb-ft) and RPM: HP = (Torque * RPM) / 5252.
Engine Horsepower Calculator
Estimate naturally aspirated or turbocharged engine brake horsepower from displacement, RPM, volumetric efficiency, and boost PSI.
Mileage Calculator
Calculate business driving mileage reimbursement deductions (IRS standard rate) and trip travel statistics.
Tire Size Calculator
Compare tire dimensions (e.g., 225/45R17 vs 245/40R18): diameter, width, sidewall height, revolutions per mile, and speedometer error.
Entertainment
Dice roller for tabletop RPGs and fun love compatibility calculator.
Dice Roller
Virtual tabletop dice roller for D&D and RPGs: roll multiple D4, D6, D8, D10, D12, D20, and D100 dice with modifier bonuses.
Love Calculator
Fun romantic compatibility algorithm analyzing names and zodiac signs to calculate a relationship match score and advice.