Reverse Calculator
Reverse Compound Interest Calculator
Work backwards from a future target and estimate the starting amount needed today.
Reverse calculator
Work backwards from a future target
Use this simple reverse calculator to estimate the starting amount needed today to reach a future target, assuming a fixed annual return and compounding frequency.
Starting amount needed
£0.00
Formula used
The calculator rearranges the compound interest formula. Instead of calculating future value from a starting amount, it divides the target future value by the growth factor.
Present value = Future value / (1 + r/n)^(n × t)For continuous compounding it uses Present value = Future value / e^(r × t).
FAQ
Frequently asked questions
It works backwards from a target future value to estimate the starting amount needed today.
This simple reverse page focuses on the starting amount needed for a target. For deposits, use the main calculator and adjust the contribution amount.
No. The calculator is for educational estimates only and does not provide personal financial advice.