💳 Interest Rate Percentage Calculator
Calculate the interest on your loan or investment with this easy percentage-based tool.
💡 What This Tool Does
Quickly find out how much interest you’ll pay or earn, based on:
-
✅ Principal amount
-
✅ Interest rate (as a percentage)
-
✅ Time period
📈 Interest Rate Calculator
Simple Interest Earned: $0.00
Total Future Value: $0.00
Compound Interest Earned: $0.00
Total Future Value: $0.00
Effective Annual Rate (EAR): 0.00%
Required Annual Rate: 0.00%
Total Interest Needed: $0.00
🧮 Interest Rate Formulas
Simple Interest
Interest = Principal × Rate × Time
Future Value = Principal + Interest
Example: $1,000 at 5% for 5 years
Interest = $1,000 × 0.05 × 5 = $250
Future Value = $1,000 + $250 = $1,250
Compound Interest
Future Value = Principal × (1 + Rate/n)n×Time
n = compounding periods per year
Example: $1,000 at 5% compounded annually for 5 years
Future Value = $1,000 × (1 + 0.05)5 = $1,276.28
Reverse Rate Calculation
Rate = n × [(FV / P)1/(n×T) - 1]
Example: $1,000 → $1,276.28 in 5 years (annual compounding)
Rate = [(1276.28 / 1000)1/5 - 1] = 5%
💡 Common Interest Scenarios
| Principal | Rate | Time | Simple Interest | Compound Interest (Annual) |
|---|---|---|---|---|
| $1,000 | 5% | 5 years | $250 | $276.28 |
| $5,000 | 7% | 10 years | $3,500 | $4,835.36 |
| $10,000 | 3% | 20 years | $6,000 | $8,083.66 |
🧠 Formula
Interest =Principal × Interest Rate × Time ÷ 100
🧮 Example
-
Principal: R2,000
-
Interest Rate: 6%
-
Time: 2 Years
👉 Interest =2,000 × 6 × 2 ÷ 100 = R240
✅ Ideal For:
-
Loans and mortgages 💳
-
Investment returns 💰
-
Savings calculations 📈
-
Financial planning 🧑💼
📱 Why Use This Tool?
-
🧮 Fast percentage calculations
-
🎯 Accurate results every time
-
📱 Fully mobile-friendly
-
💯 Free and simple to use
🔁 Related Tools:
-
👉 Percentage Increase Calculator
-
👉 Percentage Decrease Calculator
-
👉 Percentage Allocation Calculator
- 👉 Back to Percentage Calculator