Compounder - The Interest Tool

Compounder — The Compound Interest Calculator

Compound interest is the most powerful force in personal finance. Compounder shows you exactly what it means for your money.

GROWTH CALCULATOR Enter your starting balance, annual return rate, and how long you're investing. Add a periodic contribution and compound frequency to fine-tune the projection. Watch a number you recognise turn into one that doesn't feel real.

WITHDRAWAL CALCULATOR Got a pot? Find out how long it lasts. Set a withdrawal amount, inflation rate, and frequency — and see the year your savings run out (or don't).

CHARTS & YEARLY VALUES Visualise your growth curve or see every single year mapped out. Useful for planning. Mildly addictive for everyone else.

TERMINOLOGY GUIDE Every field explained, clearly. No jargon, no assumptions.

Compounder is free to use. Remove ads and help the developer with a one-time purchase to unlock the full experience.

Part of the FiHub app family — alongside Rewirement (in-depth retirement planning) and Stocker (simplified stock analysis).