Per Diem Calculator for GSA CONUS Travel

Trip type

Single day Multi-day Add Segment 2

Segment 1

State

City / County (type to search)

Start date

End date

Rates can vary by date and destination. The table shows each day’s lodging cap and M&IE. First and last travel days of each segment are at 75% M&IE.

Date	Segment	Location	Lodging cap	M&IE (full)	M&IE payable	Meals	Incidentals	Total (day)
Totals			$0	$0	$0	$0	$0	$0

How to use this calculator

Directions: Pick from a single or multi-day trip. Add up to two segments (state + city/county + dates). We calculate per-day lodging caps and M&IE, apply the GSA 75% rule on segment first/last days, split M&IE into Meals and Incidentals ($5/day), and total everything, adjusting for seasonal rates automatically.

Trip Type: Single day (one date) or Multi-day (start & end). Optionally add a second segment.
Destination: Choose State → type to search City/County → select a match. No city? We’ll fall back to that state’s Standard rate.
Dates: For each segment, pick the date(s). We apply the correct rate per day, including first/last day 75%.
Calculate: Review the per-day table and totals. Click Use "Export to CSV" to save/share.

What the columns mean

Lodging cap: Max reimbursable lodging for that night (no lodging on the last day of a segment).
M&IE (full): Full Meals & Incidentals before the 75% rule.
M&IE payable: 75% on the first/last travel day of a segment; otherwise 100%.
Meals / Incidentals: M&IE split; Incidentals fixed at $5 (scaled to $3.75 when 75% applies).

This is general information, not tax/HR advice. Confirm your internal policy and any CBA rules.

From calculator → automated expense reporting

Automate your per diems and expense reports

Turn compliant per diem lookups into one-click, policy-enforced expense reports with project/grant tracking, approvals, and audit-ready exports.

Enforces GSA rules (incl. 75% first/last day) automatically
Projects, grants & cost centers out-of-the-box
Manager & finance approvals with policy checks
Audit-ready exports
Integrates with NetSuite, Intacct, & Dynamics

Request a Demo to See it In Action

For more context on travel reimbursement policy, GSA rates, and per diem management, see these related resources:

Per Diem Calculator FAQ

What is a per diem calculator?

A per diem calculator estimates reimbursable travel allowances for lodging, meals, and incidental expenses based on destination and travel dates.

How do you calculate per diem?

You calculate per diem by matching the travel location and date to the correct rate, then applying the lodging cap, M&IE amount, and any first- or last-day reduction rules.

What is a GSA per diem calculator?

A GSA per diem calculator uses General Services Administration CONUS rate tables to estimate daily lodging and M&IE reimbursement for domestic U.S. travel.

Can this be used as a military per diem calculator?

It can help with many CONUS trips that follow GSA-based domestic travel rates, but travelers should confirm whether their branch, command, or agency requires a different DoD-specific policy.

What if my city or county is not listed?

If a specific city or county is not listed, the trip usually defaults to the applicable standard rate for that state.

Does the calculator include the 75% first and last day rule?

Yes. The calculator applies the reduced M&IE amount on the first and last travel day automatically.

Per Diem Calculator for GSA CONUS Travel

Segment 1

Segment 2

Automate your per diems and expense reports

Related Per Diem Resources

Per Diem Calculator FAQ