Free online tools, no clutter.
A clean matrix of small utilities for developers, writers, and everyday tasks. Fast, private, no sign-up.
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Popular tools
Age Calculator
Find your exact age in years, months and days.
CalculatorBMIBMI Calculator
Compute body mass index and weight category.
Finance$Take-Home Pay Calculator
Estimate US take-home pay by state and filing status.
CalculatorTIPTip Calculator
Split a bill and calculate tip per person.
CalculatorCALDate Difference
Count days, weeks or years between two dates.
Pro Dev Suite
All-in-one toolkit for teams. Try free for 14 days.
Loan Calculator
Estimate monthly loan payments and total interest.
CalculatorGPAGPA Calculator
Weight your course grades into a GPA.
CalculatorA=Area Calculator
Area of rectangle, circle or triangle.
CalculatorkcalBMR Calculator
Basal metabolic rate (Mifflin-St Jeor).
CalculatorTDEECalorie Calculator
TDEE from BMR and activity level.
Cloud Storage+
Back up files with end-to-end encryption.
Due Date Calculator
Pregnancy due date from last period or conception.
CalculatorPRCPermutation & Combination Calculator
nPr and nCr from n and r.
CalculatorPRGProgrammer Calculator
A free programmer calculator: switch between binary, octal, decimal and hex, and apply bitwise AND, OR, XOR, shifts and rotations.
CalculatorR72Rule of 72 Calculator
Estimate years to double money at a fixed rate.
CalculatorPVPresent Value Calculator
Discount a future sum to today value.
CalculatorFVFuture Value Calculator
Grow a present sum at a fixed rate.
CalculatorINTSimple Interest Calculator
Interest on principal only, no compounding.
CalculatorMKMarkup Calculator
Markup and margin from cost and price.
CalculatorDCDiscount Calculator
Final price and savings after a percent off.
CalculatorYLDPercent Yield Calculator
Actual over theoretical yield.
CalculatorGSTGST Calculator
Add or see GST on a price.
CalculatorBEBreak-Even Calculator
Units needed to cover costs.
CalculatorUPUnit Price Calculator
Price per single unit.
CalculatorNWNet Worth Calculator
Assets minus what you owe.
CalculatorDTIDebt-to-Income Calculator
Monthly debt vs income.
CalculatorHRSHourly to Salary Calculator
Annual pay from an hourly rate.
CalculatorOTOvertime Pay Calculator
Regular plus overtime wages.
CalculatorCPPCost Plus Pricing Calculator
Add a markup to cost.
CalculatorSUBSubscription Cost Calculator
Yearly and weekly cost.
CalculatorHABHabit Cost Calculator
Yearly cost of a habit.
CalculatorLSLease Calculator
Total cost of a lease.
CalculatorDIVDividend Yield Calculator
Annual return from dividends.
CalculatorAPRAPR Calculator
Effective rate from nominal.
CalculatorQUAQuadratic Formula Calculator
Roots of ax^2 + bx + c = 0.
CalculatorDISDistance Calculator
Distance from speed and time.
CalculatorPACPace Calculator
Min per km and speed.
CalculatorRATRatio Calculator
Simplify a ratio a:b.
CalculatorMPGFuel Economy Calculator
Distance per unit of fuel.
CalculatorH2OWater Intake Calculator
Daily water in liters.
CalculatorHRHeart Rate Calculator
Max HR and zone.
CalculatorHR$Hourly Rate Calculator
Pay from annual salary.
CalculatorGRDFinal Grade Calculator
Score needed on final.
CalculatorMEDMedian Calculator
Middle value of a list.
CalculatorRNGRange Calculator
Spread from max to min.
CalculatorVARVariance Calculator
Spread around the mean.
CalculatorMODMode Calculator
Most frequent value.
CalculatorPOFPercentage Of Calculator
What is X percent of Y.
CalculatorPPMPPM Calculator
Parts per million.
CalculatorPCTPercentile Calculator
P-th percentile of a set.
CalculatorSPLBill Split Calculator
Even share per person.
CalculatorDLDownload Time Calculator
Time for a file at a speed.
CalculatorDPIPixels to Inches Calculator
Pixels at a given DPI.
CalculatorIOPInterest-Only Payment Calculator
Monthly interest on a loan.
CalculatorSTPSteps to Miles Calculator
Steps as walking distance.
CalculatorASPAspect Ratio Calculator
Scale size, keep ratio.
CalculatorERRPercentage Error Calculator
Measured vs actual error.
CalculatorOHMOhm's Law Calculator
Voltage, current, power.
CalculatorPRFProfit Calculator
Profit and margin from revenue.
CalculatorHYPHypotenuse Calculator
Pythagorean c side.
CalculatorRVPReverse Percentage Calculator
Find the original value.
CalculatorSALSalary Calculator
Hourly to annual pay.
CalculatorTAXTax Calculator
Tax and total from amount.
CalculatorCOMCommission Calculator
Earnings from sales.
CalculatorPNTPaint Calculator
Paint needed for a wall.
CalculatorFLRFlooring Calculator
Boxes for a floor.
CalculatorFNCFencing Calculator
Posts and rail length.
CalculatorSTRStair Calculator
Steps and total run.
CalculatorRMPRamp Calculator
Angle and slope.
CalculatorWHRWaist to Hip Ratio Calculator
Waist divided by hip.
CalculatorFRMBody Frame Size Calculator
Small, medium, large.
CalculatorCALCalorie Deficit Calculator
Daily kcal to lose.
CalculatorMACMacro Split Calculator
Protein, fat, carbs.
CalculatorVO2VO2 Max Calculator
Estimated aerobic fitness.
CalculatorCYLCylinder Volume Calculator
Volume of a cylinder.
CalculatorCONECone Volume Calculator
Volume of a cone.
CalculatorSACCylinder Surface Area Calculator
Surface area of a cylinder.
CalculatorFORForce Calculator
Force from mass and acceleration.
CalculatorCALCScientific Calculator
A full keypad for arithmetic, roots and powers.