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How to Calculate Savings

What is Savings?

A savings calculator projects the growth of regular contributions over time with compound interest, showing the total saved, total interest earned, and final balance.

Formula

Monthly balance = Previous × (1 + r/12) + PMT
PMT
monthly contribution — monthly contribution

Step-by-Step Guide

  1. 1Monthly balance = Previous × (1 + r/12) + PMT
  2. 2r = annual interest rate; PMT = monthly contribution
  3. 3Compound frequency: most savings accounts compound monthly or daily
  4. 4ISA (UK) / 401k (US): tax-advantaged versions multiply impact

Worked Examples

Input
£300/month, 4% annual rate, 10 years
Result
Total saved £36,000; Interest earned ≈ £7,900; Balance ≈ £43,900

Frequently Asked Questions

What is Savings?

A savings calculator projects the growth of regular contributions over time with compound interest, showing the total saved, total interest earned, and final balance. Use this calculator for accurate, instant results.

How accurate is the Savings calculator?

The calculator uses the standard published formula for savings. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Savings calculator use?

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Savings calculator use?

The core formula is: Monthly balance = Previous × (1 + r/12) + PMT. Each step in the calculation is shown so you can verify the result manually.

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