All calculators
Saving & interest
Compound interest, savings plans, instant-access and fixed-term scenarios, inflation and purchasing power.
Compound interest calculator
See how a starting amount and monthly contributions grow with compound interest, with an open formula, a year-by-year table and worked examples in your browser.
Savings goal calculator
Work out any of five figures for a savings plan: the final balance, the monthly amount to reach a goal, how long it takes, the starting sum or the rate needed.
Inflation calculator
See how inflation erodes money both ways: what a sum today is worth later, and what a future sum is worth in today's money — loss shown in your currency and per cent.
Savings interest calculator
See the interest and final balance a savings deposit earns at a rate you choose — easy-access or fixed-term, with a compounding schedule and effective annual rate.
Real return calculator
Work out your real return after inflation and fees with the exact Fisher relationship — and see how far the 'nominal minus inflation' rule of thumb is off.
Budget & reserves
Household budget, savings rate and emergency fund — your month in numbers.
Emergency fund calculator
Work out how big your emergency fund should be and when you'll have it: set your own months of cover and see the target, the gap, progress and time to reach it.
Household budget calculator
Plan a monthly budget: enter income and expenses to see the balance, your savings rate and how spending splits — with an optional 50/30/20 check, in your browser.
Savings rate calculator
Work out your savings rate from income and what you save — or the amount a target rate needs — and see the long-run effect of saving one point more.
Subscription & fixed-cost calculator
Convert subscriptions and fixed costs at any payment interval to monthly and yearly totals — with the largest cost driver and an optional invest-instead scenario.
Investing & returns
Returns, costs, dividends and portfolio scenarios with your own assumptions.
Fund fees calculator
See how an ongoing charge and other fund fees quietly eat into an investment over the years — your own assumptions, no product data, all in your browser.
CAGR calculator
Work out total return, the annualised return (CAGR) or a target value from a start and end value — no interim cash flows, neutral and in your browser.
Dividend calculator
Work out a dividend yield, project payouts at an assumed growth rate and see how reinvestment compounds shares — with yield on cost, neutral and in your browser.
Lump sum vs phased investing calculator
Compare, neutrally, what investing a sum all at once or spreading it over months gives at your assumed return — no recommendation, all in your browser.
Average cost calculator
Work out the weighted average price you paid across several purchases, with and without fees, plus an optional unrealised gain or loss — neutral, in your browser.
Credit & repayment
Instalments, repayment schedules, remaining debt and overpayments — with no provider recommendation.
Loan refinancing calculator
See whether refinancing a loan pays off: total cost of the old and the new loan, the saving after switching costs and the break-even point — neutral, no providers.
Overdraft interest calculator
Work out the daily interest an overdraft costs — for a period, per month and per year (actual/365) — plus a comparison with a rate you choose, in your browser.
Effective interest rate calculator
Find a loan's effective annual rate from its payments and fees as the internal rate of return, or convert a nominal rate to the effective one — in your browser.
Property & housing
Purchase costs, renting versus buying and other housing scenarios with your own assumptions.
German property purchase costs calculator
Estimate the extra costs of buying property in Germany — land transfer tax, notary, land registry and estate agent — with your own rates, in EUR, in your browser.
Rent vs buy calculator (Germany)
Buy, or rent and invest the difference? A neutral wealth comparison of both paths for the German market — year by year on your assumptions, no recommendation.
Cars & mobility
Fuel, car and leasing costs worked out transparently — with no vehicle or provider recommendation.
Fuel cost calculator
Work out fuel or electricity cost per trip, month and year — with your own consumption and price, cost sharing, commute mode and a scenario comparison.
Car running costs calculator
Work out a car's real running costs — depreciation, insurance, tax, servicing, repairs, tyres and energy — per month and per km, with an A/B comparison.
Lease vs buy calculator
Compare the total cost of leasing and buying a car over the same period — deposit, payments, fees, excess mileage, financing and resale value. Neutral, not advice.
Everyday & work
Hourly pay and other everyday calculators — clear, neutral and without tax calculation.
Hourly wage calculator
Convert a gross monthly or annual salary to an hourly rate — and back (52 weeks/year) — plus how many working hours a purchase costs. Gross only, no tax.
Not all planned calculators are published yet – the portal grows step by step with further tested calculators around saving, investing, planning and credit.