Period Calculator
Worked example result
| Next period starts | January 29, 2026 |
| Following period starts | February 26, 2026 |
| Third period starts | March 26, 2026 |
From a last period of January 1, 2026 with a 28-day cycle, the next three periods are predicted to start January 29, February 26 and March 26, 2026.
Next periods = last period + 1×, 2× and 3× cycle length · Powered by CalcHub — Period Calculator