Letter Sums Solver

Letter Sums Solver — Step by Step

Press ✏️ Type the sums and write them like SEND + MORE = MONEY. Several sums can share letters — separate them with semicolons. Then press Solve. Or play a generated puzzle and send it here with one click.

Letter Sums Solver: rules, how to use it, tips

Replace each letter with a digit — different letters, different digits, no leading zeros — so that every sum is correct.

The rules

Each letter stands for one digit from 0 to 9.
The same letter is always the same digit, and different letters are different digits.
No number starts with 0.
In code sums, all the sums use the same code; the letters for 0 to 9, in order, spell the hidden word.

Using the solver

Type one or more sums using + − × and = (up to 10 different letters).
Press Solve and step through: leading letters, carries, what each column allows, and what-ifs, until every letter has its digit.

Tips

The extra digit. If two numbers add up to an answer with one more digit, that first digit is a carry — it must be 1.
Units first. The last column has no carry coming in: D + E must end in Y.
Carries. Each column’s total is the letters plus any carry from the right; a carry is never more than 1 when adding two numbers.
Same letter, both sides. In a column like A + B = A (with a carry), B must be 9 or 0.

The full guide, with a worked example and common mistakes: How to play Letter Sums.

Questions

How do code sums work?

All the sums share one code. When you’ve matched every letter to a digit, read the letters for 0, 1, 2 … 9 — they spell a ten-letter word.

Can I use subtraction or multiplication?

Yes — code sums at higher levels use − and ×, and the solver accepts them too.

Is there always one answer?

Yes — every puzzle here is checked to have exactly one solution.

How do I solve one I found elsewhere?

Open the Letter Sums Solver, type the sums and press Solve.