01
Import or build your sheet
Attach an .xlsx, .csv, or .tsv when you create the project — or import later from the Formula tab. Every worksheet comes in as a tab, formulas and styling preserved. Or type your math from scratch.
Calculators that capture leads
Numio is a no-code calculator builder. Import an Excel, CSV, or TSV file, assign cells to input and result blocks, and publish an embeddable web calculator that captures leads. Visitors never see the spreadsheet.
Built from your spreadsheet. Embed anywhere. Your formulas stay hidden.
Start trialTrusted 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 stands in for, and each result block at the cell it reads. Keep sample numbers in the sheet — at run time, the visitor inputs take their place. 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
One spreadsheet engine, four ways to capture and convert.
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✓
B6=B1*B2*12*(1-B3) + VLOOKUP(B4, 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
FormulaBring your Excel.
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.
- Linked cells are tinted in the sheet — amber for inputs, green for results — and clicking one names the block it drives.
- 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.
Type sample values into the cells you assign to inputs — they are placeholders. When a visitor uses the calculator, their inputs take the place of those cells and every formula recomputes in their browser.
22 spreadsheet functions (AVERAGE is also written AVG) — 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.
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.