Every number explained,
in plain English
Click a cell: Summia tells you how it’s calculated and highlights the cells it uses in color.
Even errors get explained.
Formulas, spelled out
A number you don’t understand is a number you can’t trust. Click it, and Summia writes out how it’s calculated and highlights the cells it uses in color.
| Sale price | Unit cost | Margin | |
| Armchair | $480 | $295 | $185 |
| Lamp | $95 | $44 | $51 |
| Coffee table | $340 | $195 | $145 |
| Bookcase | $160 | $92 | $68 |
Errors that explain themselves
No more cryptic error messages. An error tells you what’s wrong, and the formula points to the part that’s causing it.
Division by 0Department headcount = 0
You“Add employer taxes and benefits at 25%”
The AI writes the formulaTaxes and benefits = Gross payroll × Taxes and benefits rate
The spreadsheet calculates$439,360✓ Check it in one click
Accurate numbers, every time
Summia’s AI never does the math itself: it writes the formula, and the calculation engine does the math. No made-up numbers, and every result can be checked.
For Excel pros
Know your way around Excel? Your formulas keep their logic, imported or new, and you save time on everything else.
ExcelD4
=IF(C4>B4,(C4-B4)*8%,0)Summia
Bonus = if Actual is greater than Target, then (Actual − Target) × 8%, otherwise 0
| Target | Actual | Bonus |
| $120,000 | $134,500 | $1,160 |