Ledger Lane / money maths

Run the numbers before you sign the paperwork.

Plain-paper calculators for loans, savings, and everyday money maths. Every calculator runs in your browser — no account, no upload, no figures stored.

Ledger Lane No. 0006 · browser only

Loan Payment CalculatorOpen

Estimate a fixed-rate monthly payment and total interest.

Compound Interest CalculatorOpen

Project a balance from a starting amount, rate, and regular contributions.

Inflation CalculatorOpen

See what an amount is worth after years of a given inflation rate.

Bill Split CalculatorOpen

Split a bill with tip across any number of people.

Savings Goal PlannerOpen

Work out the monthly amount needed to reach a target by a date.

Discount & Tax CalculatorOpen

Apply a percentage discount and tax to find the final price.

Total6 calculators

Nothing leaves this device

These calculators are educational estimates. They leave out the fees, taxes, and rate changes a lender or adviser will apply, so treat the output as a starting figure and not a quote.