Money Tools

Plan, calculate, and optimise your money with practical calculators.

Practical Personal Finance Calculators

moneymargins provides a wide range of free, browser-based finance tools designed to help individuals make informed financial decisions. From tracking investments to managing taxes, these calculators save time and reduce errors in financial planning.

All calculators run locally in your browser for privacy and speed, requiring no uploads or sign-ups.

Personal Finance and Investing Tools

Whether you are planning long-term investments or assessing your portfolio, our personal finance calculators provide accurate insights for better decision-making.

Loan Repayment Calculator with Overpayments:
Calculate how additional payments reduce loan interest and shorten the repayment period.
Mortgage Overpayment Calculator (UK):
See how extra mortgage payments reduce total interest and shorten your mortgage term.
Cash ISA Calculator:
Project how your savings could grow with interest and regular deposits in a tax-free Cash ISA.
Stocks & Shares ISA Calculator:
Estimate the future value of your ISA investments with annual contributions and compound growth.
Early Retirement ISA Bridge Calculator:
Plan early retirement by calculating how long your Stocks & Shares ISA can fund your lifestyle before your private pension unlocks.
Weighted Portfolio Return Calculator:
Measure your portfolio’s overall performance using asset weights and percentage returns.
Dividend Yield & Income Calculator
Quickly compute expected dividend income for stocks, ETFs, and funds.
Compound Interest Inflation Adjustment Calculator:
Project investment growth over time while adjusting returns for inflation.
Capital Gains Tax Calculator (UK):
Estimate capital gains tax owed on UK investments and asset sales.

Relevant guides to improve your personal finance and investment planning:

Who These Finance Tools Are For

These tools are useful for:

Investors tracking portfolios, estimating returns or analysing fund performance
Homeowners planning mortgage strategies
Anyone needing quick, accurate financial calculations without installing software

Each tool is designed for fast, private browser use. Select the calculator above and start optimising your finances instantly.