01
Import or build your sheet
Drop in an .xlsx, .csv, or .tsv — every worksheet comes in as a tab, with formulas and styling preserved. Or type your math from scratch.
Turn your spreadsheet into a live web calculator.
Import your Excel, assign cells, and embed. Visitors only see your blocks — it recomputes live in their browser, and your spreadsheet stays hidden.
Get started for freeTrusted by leading teams at
How it works
Spreadsheet to live calculator, in three steps.
02
Assign cells to inputs & outputs
Point each input block at the cell it fills, and each result block at the cell it reads. The same Assign control wires up both sides.
03
Embed & capture leads
Publish, copy the embed, and drop it on your site. Capture leads, track responses, export to CSV/Excel.
What you can build
Same spreadsheet engine, four shapes. Mix inputs and result blocks however your model needs.
Calculators
ROI tools, pricing, configurators — any number-out tool, wired to your sheet.
Pricing calculator
Price / seat$12
Discount10%
Total / yr$6,480
Lead capture
Drop a lead form on the result — name, email, phone — with notifications.
Get in touch
Full nameJane Cooper
Work emailjane@acme.com
Phone(555) 012-3456
Get my results
Charts
Bar, horizontal-bar, and doughnut — each data point driven by its own cell.
Savings by category
Logic branching
Turn a computed number into a labeled outcome with its own image.
Your result
82/ 100
0–40 Just starting
41–70 On track
71–100 Expert✓
B7=B2*B3*(1-B4) + VLOOKUP(B5, Rates!A:B, 2)
A
B
C
D
E
1
Seats
50
2
Price / seat
$12
3
Discount
10%
4
Rate add-on
Rates!
5
6
Total / yr
$6,480
7
8
9
10
11
12
Pricing modelRate tableTiers
Formula
Bring your Excel. Skip the rewrite.
- Assign cells to both inputs and results — you own the whole sheet, no reserved rows.
- Multi-worksheet import: every tab comes in, with cross-sheet references intact.
- .xlsx, .csv, .tsv — formulas, fonts, colors, and column widths preserved on import.
- The spreadsheet functions that matter — SUM, IF, VLOOKUP, INDEX/MATCH, and more.
Put it anywhere — and measure everything.
Embed, share, capture leads, and track every response with a full analytics dashboard.
Embed
One-line iframe on any site or CMS.
Share links
Public + named tracking links for attribution.
Lead capture
Form, link, or image — with email notifications.
Analytics & export
Response map, per-version stats, CSV/Excel export.
FAQs
No — visitors only see your blocks. The sheet powers the math invisibly and recomputes in their browser.
A focused, dependable set — SUM, AVERAGE, MIN/MAX, COUNT, ROUND, IF, AND/OR/NOT, IFERROR, VLOOKUP, HLOOKUP, INDEX, MATCH and more, plus operators, ranges, and cross-sheet references. Anything unsupported evaluates to 0, so check the reference if a result reads 0.
Yes. Import an .xlsx, .csv, or .tsv and every worksheet comes in as a tab — formulas, fonts, colors, and column widths preserved. Legacy .xls should be re-saved as .xlsx first.
Yes — start any plan with a 14-day free trial. $0 due today, no credit card required to begin building.
Conditional results and logic branching (turning a computed number into a labeled outcome) are Business-tier. Lead forms, tracking links, and removing the Numio watermark start on Professional.