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Online Annuity Calculator
Calculate the future or present value of ordinary annuities easily and accurately with our online annuity calculator. Ideal for financial planning and investment projections.
Result
End Balance ($): 157,013.80
Total Principal ($): 135,000.00
Total Interest ($): 22,013.80
Starting Principal
Additions
Interest
0 yr
1 yr
2 yr
3 yr
4 yr
5 yr
| MONTHS | BEGINNING BALANCE ($) | INTEREST ($) | PRINCIPAL ($) | ENDING BALANCE ($) |
|---|---|---|---|---|
| 1 | 109731.97 | 3632.01 | 107000 | 110632.01 |
| 2 | 120704.6 | 7636.14 | 114000 | 121636.14 |
| 3 | 132061.28 | 12025.42 | 121000 | 133025.42 |
| 4 | 143815.43 | 16813.32 | 128000 | 144813.32 |
| 5 | 155980.98 | 22013.8 | 135000 | 157013.8 |
| MONTHS | BEGINNING BALANCE ($) | INTEREST ($) | PRINCIPAL ($) | ENDING BALANCE ($) |
|---|---|---|---|---|
| 1 | 100000 | 288.76 | 100583.33 | 100872.1 |
| 2 | 100872.1 | 580.03 | 101166.67 | 101746.7 |
| 3 | 101746.7 | 873.81 | 101750 | 102623.81 |
| 4 | 102623.81 | 1170.11 | 102333.33 | 103503.44 |
| 5 | 103503.44 | 1468.93 | 102916.67 | 104385.6 |
| 6 | 104385.6 | 1770.29 | 103500 | 105270.29 |
| 7 | 105270.29 | 2074.18 | 104083.33 | 106157.52 |
| 8 | 106157.52 | 2380.62 | 104666.67 | 107047.29 |
| 9 | 107047.29 | 2689.62 | 105250 | 107939.62 |
| 10 | 107939.62 | 3001.18 | 105833.33 | 108834.51 |
| 11 | 108834.51 | 3315.31 | 106416.67 | 109731.97 |
| 12 | 109731.97 | 3632.01 | 107000 | 110632.01 |
| #1 | ||||
| 13 | 110632.01 | 3951.3 | 107583.33 | 111534.63 |
| 14 | 111534.63 | 4273.18 | 108166.67 | 112439.84 |
| 15 | 112439.84 | 4597.66 | 108750 | 113347.66 |
| 16 | 113347.66 | 4924.74 | 109333.33 | 114258.07 |
| 17 | 114258.07 | 5254.44 | 109916.67 | 115171.11 |
| 18 | 115171.11 | 5586.76 | 110500 | 116086.76 |
| 19 | 116086.76 | 5921.71 | 111083.33 | 117005.04 |
| 20 | 117005.04 | 6259.29 | 111666.67 | 117925.96 |
| 21 | 117925.96 | 6599.52 | 112250 | 118849.52 |
| 22 | 118849.52 | 6942.4 | 112833.33 | 119775.73 |
| 23 | 119775.73 | 7287.94 | 113416.67 | 120704.6 |
| 24 | 120704.6 | 7636.14 | 114000 | 121636.14 |
| #2 | ||||
| 25 | 121636.14 | 7987.02 | 114583.33 | 122570.36 |
| 26 | 122570.36 | 8340.58 | 115166.67 | 123507.25 |
| 27 | 123507.25 | 8696.84 | 115750 | 124446.84 |
| 28 | 124446.84 | 9055.78 | 116333.33 | 125389.12 |
| 29 | 125389.12 | 9417.44 | 116916.67 | 126334.1 |
| 30 | 126334.1 | 9781.81 | 117500 | 127281.81 |
| 31 | 127281.81 | 10148.89 | 118083.33 | 128232.23 |
| 32 | 128232.23 | 10518.71 | 118666.67 | 129185.38 |
| 33 | 129185.38 | 10891.26 | 119250 | 130141.26 |
| 34 | 130141.26 | 11266.56 | 119833.33 | 131099.89 |
| 35 | 131099.89 | 11644.61 | 120416.67 | 132061.28 |
| 36 | 132061.28 | 12025.42 | 121000 | 133025.42 |
| #3 | ||||
| 37 | 133025.42 | 12409 | 121583.33 | 133992.33 |
| 38 | 133992.33 | 12795.35 | 122166.67 | 134962.01 |
| 39 | 134962.01 | 13184.49 | 122750 | 135934.49 |
| 40 | 135934.49 | 13576.41 | 123333.33 | 136909.75 |
| 41 | 136909.75 | 13971.14 | 123916.67 | 137887.81 |
| 42 | 137887.81 | 14368.68 | 124500 | 138868.68 |
| 43 | 138868.68 | 14769.03 | 125083.33 | 139852.37 |
| 44 | 139852.37 | 15172.21 | 125666.67 | 140838.88 |
| 45 | 140838.88 | 15578.22 | 126250 | 141828.22 |
| 46 | 141828.22 | 15987.07 | 126833.33 | 142820.4 |
| 47 | 142820.4 | 16398.76 | 127416.67 | 143815.43 |
| 48 | 143815.43 | 16813.32 | 128000 | 144813.32 |
| #4 | ||||
| 49 | 144813.32 | 17230.74 | 128583.33 | 145814.07 |
| 50 | 145814.07 | 17651.03 | 129166.67 | 146817.7 |
| 51 | 146817.7 | 18074.2 | 129750 | 147824.2 |
| 52 | 147824.2 | 18500.27 | 130333.33 | 148833.6 |
| 53 | 148833.6 | 18929.23 | 130916.67 | 149845.89 |
| 54 | 149845.89 | 19361.09 | 131500 | 150861.09 |
| 55 | 150861.09 | 19795.88 | 132083.33 | 151879.21 |
| 56 | 151879.21 | 20233.58 | 132666.67 | 152900.25 |
| 57 | 152900.25 | 20674.22 | 133250 | 153924.22 |
| 58 | 153924.22 | 21117.79 | 133833.33 | 154951.12 |
| 59 | 154951.12 | 21564.32 | 134416.67 | 155980.98 |
| 60 | 155980.98 | 22013.8 | 135000 | 157013.8 |
| #5 | ||||
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What Is This Tool?
This calculator helps you determine either the future value or the present value of an ordinary annuity based on recurring payments, interest rates, and the total number of payment periods. It's useful for understanding how annuities grow over time or what their current worth is in today's dollars.
How to Use This Tool?
- Enter the recurring payment amount (C) you plan to contribute
- Input the interest rate per period (r) in decimal form (e.g., 0.005 for 0.5%)
- Specify the total number of payment periods (n)
- Select whether to calculate the future value or present value
- Click the calculate button to receive your result instantly
Key Features
- Calculates future value using the formula: FV = C × ((1+r)^n - 1) / r
- Calculates present value using the formula: PV = C × (1 - (1+r)^-n) / r
- Supports input of payment amount, interest rate per period, and number of periods
- High floating-point precision for accurate long-term financial projections
- Suitable for various annuity-based financial scenarios
Examples
- If you contribute $300 monthly at an annual interest rate of 6% (0.005 monthly rate) for 10 years (120 months), the future value is calculated as: FV = 300 × ((1.005)^120 - 1)/0.005 ≈ $48,441.60
- This example shows how your monthly contributions can accumulate under fixed interest over a decade.
Common Use Cases
- Retirement savings planning to estimate annuity growth
- Investment projections for regular contributions
- Valuing pension plans based on fixed payment schedules
- Analyzing structured settlements with recurring payments
- Comparing different annuity-based financial products
Tips & Best Practices
- Ensure consistent periodic payment amounts when using the tool
- Use accurate decimal-form interest rates for best results
- Maintain regular payment intervals to align with formula assumptions
- Double-check inputs for the number of periods to match your payment frequency
- Use results as projections, considering the calculator does not include taxes or inflation
Limitations
- Assumes payment amounts remain constant throughout the period
- Requires a fixed interest rate that does not change over time
- Presumes regular payment intervals without gaps or variations
- Does not consider the effects of taxes, inflation, or variable investment returns
Frequently Asked Questions
- What does the variable C represent in the formulas?
- C represents the recurring payment or contribution amount made each period.
- How do I convert an annual interest rate to the rate per period?
- Divide the annual rate by the number of payment periods per year to get the interest rate per period in decimal form.
- Can this calculator account for variable interest rates?
- No, the calculator assumes a fixed interest rate throughout the payment periods.
Key Terminology
- C
- The recurring payment or contribution amount made in each period.
- r
- Interest rate per period expressed in decimal form.
- n
- The total number of payment periods.
- FV
- Future value of all payments compounded over time.
- PV
- Present value of all future payments discounted to today.