Simple Interest
Calculate simple interest with formula display and reverse mode
Calculate total interest earned on a principal over time.
Formula
SI = P × R × T ÷ 100
SI = 1,00,000 × 8 × 5 ÷ 100
SI = ₹40,000
Principal
₹1,00,000
Interest Rate
8% p.a.
Time Period
5 years
Simple Interest
₹40,000
Total Amount
₹1,40,000
Monthly Interest
₹667
Interest / Total
28.57%
Year-by-Year Breakdown
| Period | Principal | Yearly Interest | Cumulative Interest | Total Amount |
|---|---|---|---|---|
| Year 1 | ₹1,00,000 | ₹8,000 | ₹8,000 | ₹1,08,000 |
| Year 2 | ₹1,00,000 | ₹8,000 | ₹16,000 | ₹1,16,000 |
| Year 3 | ₹1,00,000 | ₹8,000 | ₹24,000 | ₹1,24,000 |
| Year 4 | ₹1,00,000 | ₹8,000 | ₹32,000 | ₹1,32,000 |
| Year 5 | ₹1,00,000 | ₹8,000 | ₹40,000 | ₹1,40,000 |
Interest = 10% of Principal
After 1.3 years (15 months)
₹1,10,000
Interest: ₹10,000
Interest = 25% of Principal
After 3.1 years (38 months)
₹1,25,000
Interest: ₹25,000
Interest = 50% of Principal
After 6.3 years (75 months)
₹1,50,000
Interest: ₹50,000
Interest = 75% of Principal
After 9.4 years (113 months)
₹1,75,000
Interest: ₹75,000
Interest = 100% of Principal
After 12.5 years (150 months)
₹2,00,000
Interest: ₹1,00,000
Money Doubles
After 12.5 years (150 months)
₹2,00,000
Interest: ₹1,00,000
Interest = 150% of Principal
After 18.8 years (225 months)
₹2,50,000
Interest: ₹1,50,000
Interest = 200% of Principal
After 25.0 years (300 months)
₹3,00,000
Interest: ₹2,00,000
Money Triples
After 25.0 years (300 months)
₹3,00,000
Interest: ₹2,00,000
| Rate | Total Interest | Total Amount | Interest % |
|---|---|---|---|
6% p.a. | ₹30,000 | ₹1,30,000 | 23.1% |
8% p.a. | ₹40,000 | ₹1,40,000 | 28.6% |
10% p.a. | ₹50,000 | ₹1,50,000 | 33.3% |
12% p.a. | ₹60,000 | ₹1,60,000 | 37.5% |
Daily Interest
₹21.92
Monthly Interest
₹667
Total Return
40.00%
Doubling Time
12.5 years
Interest / Principal
40.0%
Interest per ₹1,000
₹400.00
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