Hours Calculator
Find the exact hours and minutes between two clock times, including overnight spans and an optional break, without payroll assumptions. Inputs stay in your browser.
09:45 to 17:30 the same day.
Context matters.
- This is a single clock-time span. Use Time Card Calculator for payroll, overtime, multiple shifts or compensable-time rules.
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.
Find the exact hours and minutes between two clock times, including overnight spans and an optional break, without payroll assumptions. 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 Start time, End time, How should an earlier end time be treated? and Break to subtract (minutes) supplied in the form.
- Apply the scope. It applies the Single clock-time duration arithmetic — payroll, overtime and compensable-time rules are excluded 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.
09:45 to 17:30 the same day.
- Final duration7 hours 45 minutes
Calculation purpose: Find the exact hours and minutes between two clock times, including overnight spans and an optional break, without payroll assumptions. This is a high-sensitivity reference output; the linked authority or qualified professional controls the final decision.
Numeric inputs are constrained by the field limits and the result keeps the entered units visible. Zero, minimum, maximum and non-finite values are treated as input boundaries.
Rule set 1.1.0 · Last reviewed 2026-08-22 · Next review due 2027-02-22. The source panel below contains the linked evidence.
What to know before using the result.
How do I calculate hours between two times?
Enter the start and end clock times. CalcSpan subtracts an optional break and labels whether the end is on the same day or the next day.
Can the hours calculator handle overnight time?
Yes. Auto mode treats an earlier end time as the next day, or you can select the day relationship explicitly.
Is this a time-card or payroll calculator?
No. It measures one clock-time span only; use Time Card Calculator for shifts, wages, overtime or compensable-time rules.