Calculators made to be remixed
Use an approved community calculator as-is, or open it and make a version built around your situation.
Top remixed
Uncertified Physical Album Sales Estimator
Estimate physical album sales for rock and metal releases without reliable certifications using conservative chart-run sales bands, physical release footprint, singles impact,...
World Cup 2026 Group Stage Qualification Calculator
Estimate a team's maximum possible points, remaining group-stage outcomes, and approximate chance of advancing under the 2026 format: top 2 in each...
Monthly Leaver Goal Calculator
Calculate the monthly employee leaver allowance needed to stay within an annualized turnover goal, factoring in current turnover so far and remaining...
SpaceX Nasdaq-100 Exposure Calculator
Estimate the indirect SpaceX exposure an investor could receive if SpaceX were added to the Nasdaq-100 index or reflected in QQQ-style holdings.
Investment Growth Calculator
Project a portfolio with monthly contributions, annual contribution increases, a growth chart, and yearly balances.
Father's Day Gift Budget Calculator
Estimate your total Father's Day gift spending, average cost per recipient, and how your plan compares with the U.S. average of about...
Summer AC Cooling Cost Calculator
Estimate the electricity cost of running an air conditioner during a summer heat wave, including total kWh, average daily cost, and a...
Grilling Time Calculator
Estimate total grill time, time per side, and target internal temperature for popular summer cookout foods based on thickness, doneness, and grill...
Recently approved
Fireworks Safety Distance Calculator
Estimate the minimum spectator separation distance for aerial fireworks shells using the NFPA 1123 rule of 70 feet of clearance per inch...
Trump Account Investment Growth Calculator
Estimate how a child-focused Trump Account could grow over time from a starter balance, ongoing contributions, market returns, fees, and inflation.
Sweat Rate Calculator
Estimate total fluid lost and sweat rate during a workout from body weight change, fluid intake, and exercise duration.
HR/BW Calorie Burn Calculator
Estimate calories burned during exercise using average heart rate, body weight, age, sex, and workout duration.
Earnings Calculator
Calculate earnings from hours, minutes, and seconds using an hourly rate of $75 per hour.
Meat Thaw Time Calculator
Estimate safe thawing times for frozen meat by weight using cold-water and refrigerator methods.
Ice Cooler Calculator
Estimate how many pounds and 10-pound bags of ice you need for an outdoor party based on guest count and event length.
NBA Maximum Contract Calculator
Calculate the maximum first-year NBA salary from a salary cap amount and a max contract tier percentage.
Browse by category
Budgeting
Father's Day Gift Budget Calculator
Estimate your total Father's Day gift spending, average cost per recipient, and how your plan compares with the U.S. average of about...
Chemistry
atm to ppm Converter
Convert gas partial pressure in atmospheres (atm) to parts per million by volume (ppmv), using the selected total pressure as the reference.
Cooking
Grilling Time Calculator
Estimate total grill time, time per side, and target internal temperature for popular summer cookout foods based on thickness, doneness, and grill...
Engineering
Hopper Valley Angle Calculator
Calculate the slope angle of the valley line formed where two angled hopper sides intersect, with optional plan angle for non-square corners.
Density to API Gravity Calculator
Convert liquid density or specific gravity into API gravity using the standard petroleum formula at 60°F reference conditions.
Oz to Mils Calculator
Convert PCB copper weight in ounces per square foot (oz/ft²) to copper thickness in mils, inches, millimeters, and microns.
Finance
Earnings Calculator
Calculate earnings from hours, minutes, and seconds using an hourly rate of $75 per hour.
Annualized Return Calculator
Convert a single-period return into an annualized return using the compounding formula.
Real Wage Growth Calculator
Calculate inflation-adjusted wage growth from nominal wage growth and inflation rate.
Currency Carry Trade Calculator
Estimate the annual interest rate spread and carry income for a simple currency carry trade position.
Fluid Mechanics
Rectangular Duct Shear Rate Calculator
Estimate apparent wall shear rate, wall shear stress, pressure drop, velocity, and Reynolds number for laminar Newtonian flow through a rectangular duct.
Food Safety
Meat Thaw Time Calculator
Estimate safe thawing times for frozen meat by weight using cold-water and refrigerator methods.
Geometry
Hypotenuse and Adjacent Side Calculator
Calculate the hypotenuse and adjacent side of a right triangle from a rise length in inches and an angle in degrees.
Health
24-Hour Creatinine Clearance Calculator
Estimate creatinine clearance from a timed urine collection, serum creatinine, urine volume, and urine creatinine concentration, with optional BSA correction and collection-quality...
mcg/min to mcg/kg/min Calculator
Convert a medication infusion rate in micrograms per minute to a weight-based dose in micrograms per kilogram per minute using the patient’s...
Health & Fitness
HR/BW Calorie Burn Calculator
Estimate calories burned during exercise using average heart rate, body weight, age, sex, and workout duration.
Heat Transfer
Film Coefficient & Pressure Drop Calculator
Estimate Reynolds number, Nusselt number, convective film coefficient, and straight-channel pressure drop in bar from rectangular channel dimensions, flow velocity, roughness, and...
Home & Energy
Summer AC Cooling Cost Calculator
Estimate the electricity cost of running an air conditioner during a summer heat wave, including total kWh, average daily cost, and a...
HR planning
Monthly Leaver Goal Calculator
Calculate the monthly employee leaver allowance needed to stay within an annualized turnover goal, factoring in current turnover so far and remaining...
HVAC
Cooling Capacity & Heat Pump kW Calculator
Estimate required cooling capacity for rooms, general air cooling/heating, or water cooling, then translate the load into estimated heat pump electrical kW...
Investing
Stock Drawdown Recovery Calculator
Calculate the gain required to recover from a stock drawdown and see how much larger that gain is than the original loss.
SpaceX Nasdaq-100 Exposure Calculator
Estimate the indirect SpaceX exposure an investor could receive if SpaceX were added to the Nasdaq-100 index or reflected in QQQ-style holdings.
Mortgage & Investing
Pay Off Mortgage vs Invest Calculator
Compare the future-value advantage of investing extra cash versus using it to pay down your mortgage balance.
Mortgage & Real Estate
Mortgage Refinance Savings Calculator
Compare your current mortgage with a refinance option, including monthly payment savings, lifetime interest impact, total cost, and closing-cost break-even timing.
Music & Media
Uncertified Physical Album Sales Estimator
Estimate physical album sales for rock and metal releases without reliable certifications using conservative chart-run sales bands, physical release footprint, singles impact,...
Party Planning
Ice Cooler Calculator
Estimate how many pounds and 10-pound bags of ice you need for an outdoor party based on guest count and event length.
Personal Finance
Trump Account Investment Growth Calculator
Estimate how a child-focused Trump Account could grow over time from a starter balance, ongoing contributions, market returns, fees, and inflation.
Investment Growth Calculator
Project a portfolio with monthly contributions, annual contribution increases, a growth chart, and yearly balances.
Real Estate
Home Seller Carrying Cost Calculator
Estimate what it costs to keep a home on the market based on monthly ownership costs and days on market.
Safety
Fireworks Safety Distance Calculator
Estimate the minimum spectator separation distance for aerial fireworks shells using the NFPA 1123 rule of 70 feet of clearance per inch...
Sports
World Cup 2026 Group Stage Qualification Calculator
Estimate a team's maximum possible points, remaining group-stage outcomes, and approximate chance of advancing under the 2026 format: top 2 in each...
Sports & Fitness
Sweat Rate Calculator
Estimate total fluid lost and sweat rate during a workout from body weight change, fluid intake, and exercise duration.
Sports Finance
NBA Maximum Contract Calculator
Calculate the maximum first-year NBA salary from a salary cap amount and a max contract tier percentage.
Tax
Capital Gains Tax Holding Period Calculator
Compare estimated short-term versus long-term federal capital gains tax and see the potential tax savings from holding an asset for more than...
Unit Conversion
Milliliters to Tablespoons Converter
Convert 300 ml (or any milliliter value) to tablespoons using US, metric, or UK tablespoon standards.
Unit Converters
ng/mL to IU/mL Calculator
Convert a concentration in nanograms per milliliter to international units per milliliter using a substance-specific potency factor or common preset.
SCFH to SCFM Calculator
Convert standard cubic feet per hour (SCFH) to standard cubic feet per minute (SCFM) using SCFM = SCFH ÷ 60.
mS/cm to ppm Converter
Convert electrical conductivity in millisiemens per centimeter (mS/cm) to estimated TDS in parts per million (ppm) using common 500, 640, or 700...
Weather
Thunderstorm Probability Calculator
Estimate the chance of thunderstorms in the next 6 hours from instability, moisture, lift, capping, wind shear, and current cloud/radar signals.
Heat Index “Feels Like” Temperature Calculator
Estimate apparent temperature from air temperature and relative humidity using the National Weather Service Rothfusz heat index regression.
Weather & Environment
Snow Melting Time Calculator
Estimate how long a layer or pile of snow will take to melt based on depth, area, density, temperature, sunlight, wind, and...
Web Design
PX to REM Converter
Convert pixel values to rem units using a customizable root font size.