Per Diem Calculator
Estimate a travel per diem allowance using full eligible days plus partial travel days paid at a reduced percentage.
Calculate Per Diem
Calculate full-day and partial-day per diem allowances from a daily rate, eligible travel days, and a selected partial-day percentage.
What This Per Diem Calculator Calculates
Estimate a travel per diem allowance using full eligible days plus partial travel days paid at a reduced percentage. The calculation runs locally in your browser, so values entered into this calculator are not sent to OfficeCalculator.Net by the calculation tool itself.
Formula
Per diem = Full days × Daily rate + Partial days × Daily rate × Partial-day percentage.
How to Use the Calculator
- Enter values for one consistent reporting period or scenario.
- Use the same currency, time basis, and units across related fields.
- Select Calculate to generate the primary result and supporting metrics.
- Review the formula and assumptions before using the result in a business decision.
- Use Copy, Share, or Save Result Image if you need to keep a record of the estimate.
Worked Example
At a $75 daily rate, four full days plus two partial days paid at 75% creates a total allowance from both components.
Common Uses
- Prepare an employee travel estimate.
- Check reimbursement totals before submitting expenses.
- Compare different partial-day policies.
How to Interpret the Result
Per diem rules vary by employer, destination, tax authority, meal deductions, and travel timing. Use your organization’s approved rates and eligibility rules.
Important Notes and Limitations
This calculator is provided for planning, comparison, record-checking, and educational use. Results depend on the values and assumptions entered. Payroll, HR, accounting, reimbursement, employment, and tax rules can vary by employer and jurisdiction. For official payroll, accounting, tax, employment, or reimbursement decisions, verify the result against your organization’s records and applicable professional or legal requirements.
Frequently Asked Questions
Does this include hotel costs?
Only if your daily rate is intended to include lodging. Many policies treat lodging separately.
What is a partial travel day?
It is a day paid at less than the full daily rate under your organization’s policy.
Can I use 50% for partial days?
Yes. Enter any percentage from 0 to 100 that matches your policy.
Common Search Questions About Per Diem Calculator
How do I calculate per diem?
Use the calculator on this page and enter the requested values. Calculate full-day and partial-day per diem allowances from a daily rate, eligible travel days, and a selected partial-day percentage.
How can I get the per diem result quickly?
Enter the required values, calculate, and review the result together with its supporting figures. On rebuilt mobile calculators, the answer is brought into the current viewport so the result is easy to find.
What values do I need to calculate per diem?
Use the inputs shown in the calculator form and keep units consistent. For important decisions, use measured or verified values and review the page assumptions before relying on the result.