Home & DIY
FreeConcrete Calculator
Estimate concrete for a slab, footing or round column in cubic yards, cubic metres and bags, with a waste allowance and the ready-mix cost.
Open tool FreeGravel Calculator
Work out gravel for a driveway or path in cubic yards and tons, with cost. Rectangle or circle, any depth.
Open tool FreeMulch Calculator
Work out mulch for a garden bed in cubic yards and bags, with the coverage area and cost.
Open tool FreePaint Calculator
Work out how much paint for a room or wall — gallons and litres, minus doors and windows, across coats.
Open tool FreeTile Calculator
Work out how many tiles and boxes for a floor or wall, with a waste allowance and cost.
Open tool FreeWallpaper Calculator
Work out how many wallpaper rolls for a room, allowing for the pattern repeat and waste, with cost.
Open tool FreeFlooring Calculator
Work out flooring for a room in square feet and boxes, with a waste allowance and cost.
Open tool FreeCarpet Calculator
Work out carpet for a room in square yards and metres, with a waste allowance and cost.
Open toolFinancial
FreeMortgage Calculator
Estimate a monthly mortgage payment from the loan amount, rate and term. Add taxes and insurance, and see total interest plus a full amortization schedule.
Open tool FreeLoan Calculator
Work out the monthly payment, total interest and total repayment for an auto, personal or student loan. Enter the term in months or years.
Open tool FreeLoan Comparison Calculator
Compare two loans side by side on monthly payment, total interest, fees and total cost — and see which is cheaper.
Open tool FreeCompound Interest Calculator
See how savings grow with compound interest and regular contributions — the final balance, how much is interest, and a year-by-year breakdown with a chart.
Open tool FreeSalary Calculator
Convert pay between hourly, daily, weekly, biweekly, monthly and annual. Set your hours per week and weeks per year for an accurate full conversion table.
Open tool FreeTips Calculator
Add a tip to a bill and split it evenly. Pick a quick percentage or set your own, choose the number of people, and see the tip, total and amount each.
Open tool FreeDiscount Calculator
Work out sale price and savings from a percent off, stack two discounts, or reverse a discount.
Open tool FreeSales Tax Calculator
Add or remove sales tax; state base-rate table.
Open tool FreePaycheck Calculator
Take-home pay after federal, FICA & state tax.
Open tool FreeInvestment Calculator
Project how much your investments will grow from an initial amount, regular contributions and expected annual return — with an inflation-adjusted value, growth chart and year-by-year breakdown.
Open tool FreeS&P 500 Return Calculator
See what a lump sum invested in the S&P 500 would be worth today with dividends reinvested — total return, average annual return and the inflation-adjusted real return.
Open tool FreeDollar-Cost Averaging Calculator
Backtest investing a fixed amount every month into the S&P 500 with dividends reinvested — final value, money-weighted annual return, and how it compares to a lump sum.
Open tool FreeInflation Calculator
See what a dollar amount is worth in another year using US CPI data, or forecast future value at a fixed rate.
Open tool FreeROI Calculator
Return on investment, net gain and annualized ROI from what you put in and got back.
Open tool FreeCAGR Calculator
Find the compound annual growth rate between a beginning and ending value over any number of years — plus total growth, the multiple and a growth chart.
Open tool FreeStock Profit Calculator
Work out the profit or loss and percentage return on a stock trade from the buy price, sell price, shares and commissions — with your break-even price.
Open tool FreeDividend Calculator (DRIP)
Project a dividend portfolio with reinvestment — future value, total dividends, annual income and yield on cost, or compare taking the dividends as cash.
Open tool FreeElectricity Bill Calculator
Estimate your bill from kWh and rate, or work out what an appliance costs to run.
Open tool FreeEV Charging Cost Calculator
See the cost to charge an electric car at home or on DC fast chargers — per session, per full charge, per mile and per month.
Open tool FreeMonthly Budget Calculator
Split your take-home pay across needs, wants and savings with the 50/30/20 rule, and see where every dollar goes.
Open tool FreeCredit Card Payoff Calculator
See how long to clear a credit card balance and the total interest — by monthly payment or a target payoff date.
Open tool FreeOvertime Calculator
Work out overtime pay and total gross from your hourly rate, regular and overtime hours, at time-and-a-half or double time.
Open tool FreeRent Calculator
Work out how much rent you can afford from your income, with the 30% rule and a debt-adjusted maximum.
Open tool FreeNet Worth Calculator
Total your assets and subtract your debts to see your net worth, from cash and investments to loans and cards.
Open tool FreeGas Cost Calculator
Work out the fuel cost of a trip from the distance, your MPG and the gas price — round trip and split per person.
Open toolAds & Publishing
FreeCPM Calculator
Cost per thousand impressions — solve for CPM, total cost, or impressions from any two.
Open tool FreeRPM Calculator
Earnings per 1,000 pageviews, or reverse it to find your RPM from monthly earnings.
Open tool FreeYouTube Money Calculator
Estimate daily, monthly and yearly channel earnings from views and RPM.
Open tool FreeAdSense Revenue Calculator
Estimate ad income from pageviews using RPM, or from CTR × CPC.
Open toolTime & Date
FreeHours Calculator
Find the total time between a start and end time, with an optional break. Handles overnight shifts and shows the result in hours, minutes and decimal hours.
Open tool FreeTimecard Calculator
Enter a week of shifts with breaks and an hourly rate. Get daily hours, the weekly total, regular vs overtime hours and gross pay — all in one printable table.
Open tool FreeDays Between Dates
Count the days, weeks, months and business days between two dates.
Open tool FreeAge Calculator
Calculate an exact age from a birth date to any target date — in years, months and days, plus the total in weeks, days and hours. Leap years handled.
Open toolMath & Numbers
FreeCubic Feet Calculator
Work out cubic feet from length, width and height in any unit, for a box or a cylinder — with cubic yards, cubic metres, litres and gallons alongside.
Open tool FreeMath Calculators
Fraction, percentage, rounding, PEMDAS, scientific and scientific notation calculators have moved to their own dedicated Math suite.
Open suite FreeSens Converter
Convert your mouse sensitivity between Valorant, CS2, Apex, Overwatch 2, Fortnite and more — matched by real 360° distance, with eDPI and cm/360 shown.
Open toolEducation
FreeGPA Calculator
Turn your course grades and credit hours into a GPA on the 4.0 scale, with weighted GPA for Honors and AP/IB classes.
Open tool FreeFinal Grade Calculator
Work out the grade you need on the final exam to hit your target, or your overall course grade from the final score.
Open tool HubStudy & Education Tools
A curated academic hub for students — math calculators, physics labs, science explorers, GPA and final grade.
Open hubHealth & Body
FreeHeat Index Calculator
Turn temperature and humidity into the "feels like" heat index, with a risk level and a full heat index chart.
Open tool FreeBMI Calculator
Work out your Body Mass Index from height and weight in metric or imperial units, with your BMI category and healthy weight range.
Open tool