Day Counter
Days between dates, with or without weekends and holidays.
Calculators
Everyday maths, money and measurements, worked out for you.
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Scientific Calculator
Trigonometry, logarithms, powers and constants with full expression entry.
Roth IRA Calculator
Tax-free growth, and whether Roth beats traditional for you.
Geometry Calculator
Area, perimeter, surface area and volume for every common shape.
Work Hours Calculator
A weekly timesheet with breaks, overtime and total pay.
Triangle Calculator
Solve any triangle from three known sides or angles.
Random Number Generator
Generate random numbers in any range, with or without duplicates.
Hex Calculator
Hexadecimal arithmetic, conversion and byte values.
Unit Converter Calculator
One converter for length, weight, area, volume, speed, time and more.
Fat Intake Calculator
Daily fat in grams, split into saturated and unsaturated.
TDEE Calculator
Total daily energy expenditure across every activity level.
VAT Calculator
Add or strip VAT at any rate, with presets for common countries.
Roofing Calculator
Roof area, squares and bundles from pitch and footprint.
ROI Calculator
Return on investment, total and annualized.
Annuity Calculator
What regular payments grow to, ordinary or due.
Debt Consolidation Calculator
Whether consolidating your debts actually costs you less.
Mortgage Amortization Calculator
A full payment-by-payment schedule with yearly totals.
Down Payment Calculator
What your down payment buys you in price, payment and LTV.
Roman Numeral Calculator
Convert to and from Roman numerals and do arithmetic in them.
Volume Calculator
Volume of any 3D shape and conversion between volume units.
Investment Calculator
Project a portfolio with contributions, growth and inflation adjustment.
Least Common Multiple Calculator
LCM by prime factorisation, listing and the GCF shortcut.
Gravel Calculator
Gravel by volume and weight, for any material type.
Horsepower Calculator
Horsepower from torque and RPM, or from work over time.
Debt-to-Income Ratio Calculator
The DTI ratio lenders check before approving you.
Business Loan Calculator
Business loan payment, total cost and effective APR with fees.
Refinance Calculator
Whether refinancing pays, and how long it takes to break even.
Permutation & Combination Calculator
nPr, nCr, factorials and counting with or without repetition.
Distance Calculator
Distance from speed and time, or between two map coordinates.
Height Calculator
Convert height between units and predict a child's adult height.
EMI Calculator
Equated monthly instalment with a principal and interest breakdown.
Ovulation Calculator
Your fertile window and ovulation day for the next six cycles.
Bandwidth Calculator
Download time, data usage and the speed you need.
Average Calculator
Find the mean, median, mode and range of any list of numbers.
Binary Calculator
Binary arithmetic, bitwise operations and two's complement.
Area Calculator
Area of any common shape, plus conversion between area units.
Calories Burned Calculator
Calories burned by activity, using published MET values.
Macro Calculator
Protein, carbs and fat in grams for your calorie target.
Age Difference Calculator
Find the exact age gap between two people in years, months and days.
GPA Calculator
Semester and cumulative GPA on a 4.0 or weighted scale.
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