Split bill calculator and bill splitter
HarnDuay: split bill calculator, bill splitter, and expense split calculator
Use HarnDuay to split restaurant bills, food costs, travel expenses, VAT, tips, and shared group spending in one place. It works best when people ordered different items or paid at different times.
Add friends
List everyone in the group, with PromptPay if you want scan-to-pay.
Add items
Enter each item with its price, who paid, and who shared it.
See who pays whom
Get instant settlement results, then share a link or save an image.
Start your split
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Summary
A split bill calculator for uneven orders
HarnDuay is designed for real-world restaurant checks where one person had extra drinks, another skipped dessert, and someone else paid the whole table first.
Instead of forcing an equal split, it lets you assign each item to the right people so the final total matches what was actually shared.
Useful for food costs, trips, VAT, and group expenses
You can use HarnDuay as a bill splitter for restaurant bills, a food cost sharing calculator for group meals, or an expense split calculator for trips and shared spending.
It also supports VAT 7%, service charge 10%, and PromptPay-friendly settlement summaries for faster payments.
Built for people searching split bill, bill splitter, or expense split calculator
This homepage is the main entry point if you are comparing split bill tools, bill splitter apps, or simple expense sharing calculators for groups.
From here you can jump into dedicated pages for food cost sharing, travel expense splitting, VAT calculation, tip handling, and practical blog guides.
Share the summary and collect money back with PromptPay
Once the bill is calculated, you can share a view-only summary link so everyone can verify their own amount, or save the summary as an image for the group chat.
If the person who paid adds their PromptPay number, HarnDuay generates a QR code so friends can scan and transfer exactly what they owe — no typing bank account numbers back and forth.
How to split a bill fairly in 5 steps
- Add everyone in the group, plus the payer's PromptPay number if you want scan-to-pay QR codes.
- Enter each receipt line with its price and quantity.
- Choose who paid for each item and who actually shared it.
- Turn on VAT 7% or service charge 10% if the venue adds them, or override per item.
- Check who owes whom, then share the summary link or save it as an image for the group.
The 7% VAT rate used in this calculator follows the current rate published by the Thai Revenue Department, while the 10% service charge reflects the common rate at restaurants in Thailand.
FAQ
Can HarnDuay split bills when everyone ordered different items?
Yes. You can assign each item to a payer and to the people who actually shared it.
Can I use HarnDuay for travel or group expenses?
Yes. HarnDuay also works for hotels, fuel, transport, tickets, and other shared trip costs.
Does HarnDuay support VAT and service charge?
Yes. It supports both VAT 7% and service charge 10%, including per-item overrides.
Is HarnDuay free? Do I need an account?
Yes, it is completely free. There is no sign-up and no app install — open the site and start splitting on any device.
Does HarnDuay support PromptPay?
Yes. Add the payer's PromptPay number and HarnDuay generates a QR code so friends can scan and transfer their exact share.
Where is my bill data stored?
Calculations run mainly in your browser and no account is required. See the privacy policy page for details.
How do I share the result with friends?
Share a view-only summary link, or save the summary as an image and send it to your group chat.