Appliance Delay Start Calculator
Convert a target finish time or off-peak window into an appliance start time and panel delay, including overnight spans. Inputs stay in your browser.
The program should start at Aug 24, 2026 · 4:35 AM and finish at Aug 24, 2026 · 7:15 AM.
Context matters.
- Delay-start panels usually round to whole hours. If the panel cannot represent the result exactly, start earlier and confirm the displayed finish time.
- Off-peak tariffs, holidays and event days vary; use the current utility schedule you entered.
Sources & scope
The calculation guide and this source trail show what the result means, where the rule came from and when it was last reviewed. This is source-and-calculation QA, not a claim of medical, legal, tax or other professional review; time-sensitive decisions still belong with the linked authority.
A visible path from input to answer.
Convert a target finish time or off-peak window into an appliance start time and panel delay, including overnight spans. The page keeps the calculation scope and its limits beside the result so the output can be checked, copied or revisited.
- Read the record. The calculator uses What should the appliance do?, Current date, Current time, Program duration (minutes) and Target finish date and 3 additional fields supplied in the form.
- Apply the scope. It applies the User-entered appliance duration and utility window planning — appliance controls and current tariff schedule control reference and the explicit date, unit and counting conventions shown in the result.
- Expose the checkpoints. Intermediate rows, warnings and timeline events stay visible; the emphasized row identifies the primary checkpoint when one exists.
The program should start at Aug 24, 2026 · 4:35 AM and finish at Aug 24, 2026 · 7:15 AM.
- StartAug 24, 2026 · 4:35 AM
- FinishAug 24, 2026 · 7:15 AM
Calculation purpose: Convert a target finish time or off-peak window into an appliance start time and panel delay, including overnight spans. This is a high-sensitivity reference output; the linked authority or qualified professional controls the final decision.
Calendar inputs use plain year-month-day semantics. Leap days, month ends, date-pair order and unsupported dates are checked before the result is shown.
Rule set 1.1.0 · Last reviewed 2026-08-20 · Next review due 2027-02-20. The source panel below contains the linked evidence.
What to know before using the result.
How do I convert a finish time into delay start?
CalcSpan subtracts the full program duration from the target finish time, then compares that start with the entered current time.
Can it handle an overnight off-peak window?
Yes. A window such as 11:00 PM to 7:00 AM is treated as crossing midnight.
Why might my appliance panel show a different delay?
Some panels accept whole hours only or define delay as time until finish rather than time until start. Confirm the appliance display and choose the earlier representable setting.