Calculator categories
Every category on the site, with the calculators that sit under each one. Anything markedSoon has its name and its URL reserved while the maths gets built.
Mortgages, loans, savings and tax — tools that show the full breakdown, not just the answer.
- Mortgage repayment
- Mortgage extra payments
- Biweekly mortgage
- England & NI Stamp Duty
- Mansion tax
- UK Mortgage Affordability
- Loan repayment
- Credit card payoff
- Debt avalanche
- UK solar payback
- US solar payback
- 15 vs 30 year mortgage
- Rent vs buy
- Debt snowball
- Compound interest
- Emergency fund
- Hourly ↔ Salary
- Freelance rate
- Raise calculator
- UK Take-Home Pay
- UK Student Loan
- US Student Loan Payoff
Body composition, training and nutrition figures, in metric or imperial, with the working shown.
Percentages, ratios and averages, each one showing the steps rather than only the result.
- Percentage change
- Percentage of a number
- Quadratic equation
- Pythagorean theorem
- Standard deviation
- Prime factorisation
- Percentage
- Percentage increase
- Percentage decrease
- Fractions
- Fraction to decimal
- Decimal to fraction
- Mixed numbers
- Ratio
- Proportion
- Average
- Weighted average
- Mean, median, mode
- Range
- Rounding
- Absolute value
- Modulo
- Remainder
- Order of operations
Dates, times, fuel and tips — the small calculations that come up week to week.
Weight, length, temperature and volume, converted instantly and both ways.
Areas, volumes and material quantities for planning a job before you buy.
Speed, force and energy worked through with the formula alongside the answer.
Margins, break-even points and pricing figures for running the numbers on a business.
Machining and shop-floor figures — cutting data converted into the values you need, with the formula alongside the answer.
Trip budgets and travel costs, split fairly and shown with the full breakdown.