Per Diem (Diurnă) Calculator

Estimate per diem totals with a clean breakdown you can copy.

Per diem calculator

Per diem estimator
Estimation helper. Enter your own rate(s) and policy assumptions.
%
If you also get a partial per diem (e.g., travel day), set the percentage.
Optional costs
For fuel/distance, use the linked tools and paste the total here.
Breakdown
Per diem
Lodging
Transport
Total
Tip: If you need a printable proof, use the browser print function on this page after entering values.

TL;DR

Estimate travel costs using:

  • per diem (daily rate × days + partial day)
  • lodging (per night × nights)
  • other transport costs

Who this is for

  • Contractors planning travel budgets for projects.
  • Employees estimating travel reimbursement.

How to use it

  1. Set daily rate and number of full days.
  2. Adjust partial day percent (if you have a half-day rule).
  3. Add lodging and transport if needed.
  4. Copy summary for email/approval.

What per diem usually covers (and what it doesn’t)

Per diem is typically meant to cover day-to-day travel expenses such as meals and incidental costs. Lodging and major transport costs are often handled separately (depending on your policy or contract).

This calculator keeps those buckets separate so your estimate is easier to approve:

  • Per diem (daily allowance)
  • Lodging (nights × cost per night)
  • Transport (tickets, fuel, tolls, parking)

How to pick a “daily rate”

The correct rate depends on your situation:

  • Employment: follow your company reimbursement policy (and any country-specific rules your payroll uses).
  • Contracting (B2B): follow your contract with the client (what is reimbursable vs included in rate).
  • Mixed: if you’re unsure, use a conservative rate and treat this as a budgeting tool.

Partial days (arrival/departure days)

Many policies treat travel days differently from full days (e.g., half-day per diem). This tool lets you model that with a percentage so you can match how your company/client reimburses.

Domestic vs international travel

If you travel internationally, per diem and reimbursement rules often change:

  • different daily rates per country/city
  • currency and FX handling
  • different receipt requirements

This tool stays generic so you can plug in whatever rate your policy/contract uses.

Practical workflows

Budget request (before travel)

Use the output as a simple “travel budget” summary:

  • purpose of travel
  • dates (days + nights)
  • per diem rate assumptions
  • lodging and transport estimates This reduces friction with finance/procurement approvals.

Contractor invoicing

If your contract reimburses travel separately:

  • attach the estimate when you request pre-approval
  • keep receipts and confirmations
  • invoice reimbursables with clear line items

Approval-ready checklist (reduces back-and-forth)

Before you send the estimate for approval, ensure you can answer:

  • Why is the travel needed (business purpose)?
  • Exact dates (days + nights) and location(s)
  • Assumptions (per diem rate, partial day rule, hotel/night cap)
  • What will be reimbursed vs included in your base rate

This turns “travel cost” into a predictable line item rather than a surprise expense.

Edge cases & gotchas

  • Reimbursement rules differ by company/policy; treat as a planning tool.
  • Keep receipts and follow your internal process.
  • Currency: if you travel abroad, decide which currency you budget in and how FX is handled.
  • If you need “all-in” trip cost, consider adding parking, tolls, and local transport, not just fuel.

FAQ

This tool is for budgeting math. Legal/tax treatment depends on your specific context and up-to-date rules. Confirm with your accountant/HR if you need compliance-level accuracy.

What if my company reimburses meals by receipts instead of per diem?

Set per diem to zero and use lodging/transport fields as needed. Or keep per diem as a cap and track receipts separately.

What next?

Related tools:

Sources

Next steps (IT Jobs List)

For travel, include all real costs (fuel, tolls, parking) and write down assumptions so you can reproduce the calculation.

Quick recommendation

  • Save your assumptions (rates, breaks, thresholds) so you can reproduce the result.
  • If you use the output in an invoice/offer, include a short explanation (what’s included and what’s not).

Practical checklist (IT Jobs List)

  • Keep assumptions: consumption, price/liter, distance, tolls.
  • Compare “cost per km” between routes/providers.
  • If you use the result in an estimate/invoice, explain what it includes.
By Ivo Pereira Last updated: 2025-12-27
Quick notes & assumptions

Notes

  • This tool calculates totals based on your inputs. Always confirm rates/caps with your company policy and accountant.

Per diem (diurnă) — practical guide

Per diem rules can vary by company policy and by travel type. This tool focuses on the part you always need: a clean total with a breakdown you can copy.

Enter your per diem rate, number of full days, optional partial day, and any lodging/transport you want to track.

Common scenarios

  • Employee travel: per diem + lodging reimbursed, transport reimbursed separately.
  • Freelancer travel: per diem-like daily allowance for budgeting, plus actual expenses.
  • Project travel: compare client reimbursement vs your real costs.

How to keep it audit-friendly

  • Use consistent categories (per diem, lodging, transport) across projects.
  • Keep receipts for lodging/transport if you need documentation.
  • If your accountant needs a specific breakdown, mirror their categories here.