Number-to-Words Conversion

RMB amount-to-words and invoice helper

The Amount-in-Words converter turns digits into formal Chinese amounts that meet reimbursement standards, with invoice-header storage built in. Under the Accounting Law, voucher amounts must appear in both forms to deter alteration. It covers invoicing, contracts, checks, receipts and ledgers. Header data stays in localStorage — never uploaded. Built for finance staff and anyone filling out forms.

RMB Case Conversion

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Invoice Details Memo

Store your frequent invoice details in the browser and copy them in one click.

Stored on this device only

RMB Formal-Amount Rules & Voucher Standards

Origin of formal numerals

Formal Chinese numerals date to the Ming dynasty. After the notorious Guo Huan corruption case, Emperor Zhu Yuanzhang ordered ledger figures written in complex formal characters to prevent alteration — their dense strokes resist forged additions.

That's exactly why checks, contracts and invoices must use formal amounts.

Upper vs lower case mapping

  • 0 → 零 (note: not 〇)
  • 1 → 壹
  • 2 → 贰
  • 3 → 叁
  • 4 → 肆
  • 5 → 伍
  • 6 → 陆
  • 7 → 柒
  • 8 → 捌
  • 9 → 玖

Standard unit notation

  • 圆 / 元 (yuan) (formally written 圆)
  • 角 (jiao) (拾 = formal "ten" in older usage, now rare)
  • 分 (fen)
  • 整 ("only") (the closing 整 must not be omitted)

Example: ¥1,234.56 → 壹仟贰佰叁拾肆圆伍角陆分 (1,234.56)

Common mistakes and use cases

Common mistakes when writing formal amounts:

  • Omitting 整 ("only"): 壹万元整 is standard; 壹万元 alone is imprecise
  • Digits for jiao/fen: always write the formal characters (零壹贰叁...)
  • Mixing 零 and 〇: formal writing always uses 零
  • Alteration: formal amounts must never be corrected — reissue instead

Use cases: checks, drafts, contracts, invoices, receipts, IOUs and other formal documents.

This tool follows the PBOC Payment and Settlement Rules for formal amounts; for official documents follow your bank's or tax system's requirements.

Frequently Asked Questions

Why do reimbursements require formal words?

The Accounting Law requires formal words on vouchers to match the figures exactly — it prevents alteration and is the compliant standard.

Is locally stored invoice data safe?

Yes. Data lives in your browser's localStorage, never uploaded. Clear or export anytime.

Which scenarios are supported?

Reimbursements, invoicing, contract amounts, checks and drafts, receipts, ledger entries and more.

Is traditional Chinese supported?

Output is in simplified Chinese formal words; traditional output isn't offered yet.

📚 Further Reading

Want to dig into the conventions behind Amount in Words? Recommended reading:

📖
RMB Capitalization & Invoice Header: A Complete Guide to Reimbursements
Why must reimbursements use formal words? How to manage invoice headers? Essential conventions for finance staff.
⏱ About 4 min read