Build your own calculator
Need a calculator that doesn't exist yet? We build custom one-of-a-kind calculators or whole suites of related calcs โ perfect for contractors, tax pros, agencies, or anyone with specialized math.
Custom calculator
$249
One brand-new calculator built to your spec.
- Inputs and formula you describe
- Self-contained HTML/CSS embed
- 1 round of revisions included
- Your branding (no Calc.Cards attribution)
- Lifetime updates if formula changes
Start a single brief
Custom suite
$299
Several related calculators bundled into one cohesive tool.
- Up to 5 connected calculators
- Shared theme and branding
- Tabbed or multi-step interface
- Same self-contained HTML/CSS
- 2 rounds of revisions included
Start a suite brief
Examples we've built or could build
Click any card to load that example into the wizard below. Edit any field to make it yours, then submit to start checkout.
Suite โ $299
Contractor estimator suite
Material + labor + tax + permit cost in one tool. 5 connected calcs with shared inputs.
Use this briefSuite โ $299
Tax accountant fee estimator
Hourly billing + return complexity + state filings + e-file fees. Shows itemized quote.
Use this briefSingle โ $249
Insurance quote calculator
Multi-step: vehicle + driver + coverage + discounts โ final premium estimate.
Use this briefSingle โ $249
Solar payback calculator
System size + local rates + incentives โ 25-year payback timeline.
Use this briefSingle โ $249
Restaurant pricing calculator
Food cost + labor + overhead + margin target โ menu price recommendations.
Use this briefSingle โ $249
Law firm settlement calculator
Damages + attorney fee + costs + lien deductions โ client take-home.
Use this briefDescribe your calculator
Tell us what you need. Edit any field then submit to start checkout, or send us the brief if you'd rather get a custom proposal.