TopToolAISimple & Compound Interest Calculator
Compare simple interest against compound interest on a principal amount over time, and see exactly how much extra compounding earns you. PKR 100,000 invested for 10 years at 8% grows to PKR 200,000 under simple interest but to roughly PKR 215,900 under annual compounding — the gap widens every year as interest starts earning interest on itself.
How to use Simple & Compound Interest Calculator
Step-by-step guide to the boxes below. Open it only if you need help.
How to use Simple & Compound Interest Calculator
Step-by-step guide to the boxes below. Open it only if you need help.
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1
Principal Number
The lump sum you are investing at the start.
Example: 10000
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2
Annual rate % Number
The yearly return or interest you expect, for example 8.
Example: 8
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3
Years Number
How long the money will stay invested.
Example: 5
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4
Press “Calculate”
Click the button under the boxes. If something is missing or not valid, a short message tells you which box to fix.
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5
Read your result
Simple and compound interest are shown side by side, so you can see what compounding adds. Change any box and try again to compare different numbers.
Simple & Compound Interest Calculator FAQs
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