Simple, transparent pricing
Start free with all 28 calculators. Pay once for Pro — no subscriptions, no hidden fees.
Free
For individual engineers and students
$0forever
- All 28 calculators
- NEC + IEC dual standard
- Up to 3 projects
- PDF reports (watermarked)
- Chain calculation engine
- Excel export
- Custom branding
- Unlimited projects
Best Value
Pro
Lifetime access for professional engineers
$30one-time
- All 28 calculators
- NEC + IEC dual standard
- Unlimited projects
- PDF reports (unbranded)
- Chain calculation engine
- Excel export
- Custom branding & logo
- Priority support
Frequently Asked Questions
Is this a subscription?
No. Pro is a one-time $30 payment — you get lifetime access with no recurring charges.
Can I try before I buy?
Yes. All 28 calculators are free to use immediately. Pro unlocks unlimited projects, unbranded PDF reports, Excel export, and the chain calculation engine.
What payment methods do you accept?
We use Stripe for secure payment processing. All major credit/debit cards are accepted.
Do I need an account to use the calculators?
No. All calculators work without an account. Sign in to save calculations to projects and access Pro features.
One-time purchase. Lifetime access. No recurring fees.
All plans include access to NEC and IEC standard tables.