UTC Offset Calculator

Work out utc offset instantly with clear inputs, formula shown and shareable results.

About UTC Offset Calculator

The UTC offset is local time minus UTC, wrapped into the valid range of -12 to +14. Local 15:30 against 12:00 UTC gives +3:30. Offsets outside whole hours exist because several countries chose 30 or 45 minute alignments to better match local solar time.

Formulas

UTC offset

offset = local time - UTC, wrapped into -12 to +14

Notation

written as UTC+hh:mm or UTC-hh:mm

Worked example

With the default values below, UTC Offset Calculator returns UTC Offset of 3.50. Change any input above and every figure here is recalculated in your browser.

Inputs used

Local timeaccepts 0–23.99 h: 15.5 h
Current UTC timeaccepts 0–23.99 h: 12 h

Results

UTC Offset: 3.50 h
Offset In Standard Notation: UTC+03:30
Offset In Minutes: 210
Offset Type: Fractional offset - 30 or 45 minute zone

Step by step

1Values used
2UTC offset
3Notation
4UTC Offset= 3.50 h
5Offset In Standard Notation= UTC+03:30
6Offset In Minutes= 210
7Offset Type= Fractional offset - 30 or 45 minute zone

Assumptions and limits

The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why does the range extend to +14?

Because Kiribati moved the Line Islands across the date line in 1995 to share a working week with Asia, creating UTC+14.

Is UTC the same as GMT?

Practically, though not technically. UTC is an atomic time standard with leap seconds; GMT is a time zone based on the Greenwich meridian.