📉 Maximum Drawdown Calculator
Largest peak-to-trough decline
How to Use This Calculator
1
Enter Series
Price or equity values in time order.
2
Calculate MDD
Largest peak-to-trough % decline is reported.
Formula
MDD = max over t ( (Peak_t − Value_t) / Peak_t )
Frequently Asked Questions
Does it use log returns?
This uses arithmetic levels; you can input equity series from PnL for precision.
Can MDD be 0?
Yes, if the series is non-decreasing (no drawdowns).