Set a date. Plan your checks. Record what actually hatches.
The setting date is Day 0. Day 7 means seven complete days after setting. Dates are estimates and do not guarantee a hatch.
The calendar button downloads an ICS file for import into your calendar app. Some phones require you to open the file in their calendar app. It does not add dates without your action.
Record observed results. Eggs that look clear at an early check may need another check before you decide they are infertile.
Saving keeps one batch in this browser and replaces the previous saved batch. A downloaded log gives you a separate copy. No server receives your entries.
Pekin type ducks usually hatch after 28 days. Muscovy ducks take about 35 days. This tool adds complete calendar days to the setting date, so an October 4 setting gives a Pekin estimate of November 1.
Candle around Day 7 to inspect development. For Pekin eggs in an incubator, Day 25 is the transfer point. Stop turning when eggs enter the hatching phase. If you use a combined machine, follow its instructions for preparing the hatching area.
For a broody bird, the final preparation date means getting the duckling area ready. It is not an instruction to remove eggs from her nest. The bird handles natural turning.
Dates alone cannot manage temperature, humidity, ventilation or egg condition. Follow instructions for your equipment and breed. A power failure needs a record of its duration and conditions, rather than an automatic extra day added to the calendar.
Read our duck farming pillar guide for duckling care. Our egg incubation guide covers equipment checks and power failures, but its main schedule is for chickens. Do not use that chicken schedule for ducks.
Zero full days have elapsed when you set the eggs. The next calendar date is Day 1. This keeps date arithmetic consistent and avoids counting the setting date twice.
No. It is a provisional planning date based on a 35 day estimate and a three day final period. Confirm it with your hatchery or incubator maker before relying on it. You can adjust the day above.
Research discusses greater cooling needs later in Muscovy incubation. It does not give every machine the same operating programme. This calculator gives a Day 16 reminder to review your maker's instructions, not a command to start cooling or spraying eggs.
The tool flags longer storage because it can reduce hatchability. Fourteen days is not a boundary before which there is no loss. Storage conditions and egg age matter before that point too.
They answer different questions. From 20 eggs set, 16 fertile eggs and 12 ducklings, fertility is 80 percent, hatch rate is 60 percent, and hatch of fertile eggs is 75 percent.
No. Development may be affected in ways a date tool cannot measure. Record the outage and assess the eggs with experienced help.
Sources checked on October 4, 2026. Muscovy final preparation timing remains provisional. Confirm it against instructions for your breed and incubator before relying on it.