Date and Time Math in a Note

Add or subtract days, weeks, months and years from today, and add up hours and minutes. Deadline, trip and countdown examples for Calto.

Updated: 2026-09-16

Date questions are always “today plus something”. Calto answers them inline.

Deadlines

today + 30 days                → 2026-10-16
today + 6 weeks                → 2026-10-28
today + 3 months               → 2026-12-16
today - 1 year                 → 2025-09-16

Singular and plural both work (1 day, 2 weeks). Results are shown as yyyy-MM-dd.

A trip

depart = today + 12 days
return = today + 19 days

Name the dates and the note reads like a plan.

Adding up time

Compound time expressions collapse to the smallest unit you used.

2h 5min                        → 125 min
1h 30min 15s                   → 5,415 s

Convert with in:

125min in h                    → 2.08
3 days in h                    → 72

Work hours this week

Mon
8h 30min                       → 510 min

Tue
7h 45min                       → 465 min

510min + 465min in h           → 16.25

What Calto does not do (yet)

It does not read written dates such as 2026-12-25, so it cannot count days to a date. Start from today and add. Dates are computed from your device clock.

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