Compound Interest Calculator
Free · No sign-up required
Compound Interest
Model how an initial deposit and regular contributions grow over time through the effect of compounding returns.
Parameters
£
£
7.0%0.1 – 20%
20 years1 – 50
Final Balance
Total Contributed
Interest Earned
Savings Goal Planner
Calculate the exact monthly savings required to reach a financial target by a specified date.
Parameters
£
£
3 years1 – 30
4.5%0 – 15%
Monthly Saving Required
Total Contributions
Interest Earned
Investment Growth Simulator
Project portfolio growth across three market scenarios with regular contributions over a defined horizon.
Capital & Contributions
£
£
Return Rate Scenarios
%
%
%
25 years1 – 40
Total Contributed
Pension Calculator
Estimate the size of your retirement fund and projected annual income based on your contributions and investment growth.
Your Details
£
£
£
7%1 – 15%
Projected Pension Pot
Est. Annual Income
Est. Monthly Income
Years to Retirement
Income estimated using 4% annual drawdown. State pension not included. Past performance is not indicative of future results.
Mortgage Calculator
Calculate monthly repayments, total interest payable, and loan-to-value ratio on a repayment mortgage.
Property Details
£
£
4.5%0.5 – 15%
25 years5 – 35
Monthly Payment
Total Repaid
Total Interest
LTV Ratio
Stamp Duty Calculator
Calculate Stamp Duty Land Tax (SDLT) on residential property purchases in England and Northern Ireland — 2024/25 rates.
Rates apply to England & Northern Ireland only. Scotland uses Land and Buildings Transaction Tax (LBTT); Wales uses Land Transaction Tax (LTT).
Property Details
£
Stamp Duty Payable
Effective Rate
Total Cost of Purchase
Loan Repayment
Calculate monthly payments, total interest, and total cost for any personal loan or finance agreement.
Loan Details
£
%
48 months (4 yrs)6 – 120
Monthly Payment
Total Repaid
Total Interest
UK Income Tax Calculator
Estimate your take-home pay after income tax, National Insurance contributions, and optional pension deductions — 2024/25 England rates.
Income Details
£
%
Annual Take-Home
Monthly Take-Home
Income Tax
National Insurance
VAT Calculator
Add VAT to a net amount or extract VAT from a gross figure. Supports standard, reduced, zero, and custom rates.
Parameters
£
Ex-VAT Amount
VAT Amount
Inc-VAT Amount
ROI Calculator
Measure return on investment for any asset, project, or venture — including annualised CAGR.
Investment Details
£
£
£
Total ROI
Net Profit / Loss
Annualised Return (CAGR)
Inflation Calculator
Understand the real purchasing power of money over time and what a sum today will be worth in the future.
Parameters
£
%
10 years1 – 50
Future Equivalent Value
Purchasing Power Lost
Real Value in Today's £
Break-Even Analysis
Calculate the sales volume required to cover all costs for a product, service, or business venture.
Cost & Revenue Inputs
£
£
£
£
Break-Even Units
Break-Even Revenue
Contribution Margin
Units for Target Profit
Currency Converter
Convert between major world currencies using indicative market rates across 15 currencies.
Conversion
Converted Amount
Exchange Rate
Inverse Rate
Indicative rates only — updated periodically. Not suitable for live transactional use.