Optional, never required
Use it without ads
Every calculator is free and stays free — signed in or not. A membership simply removes the advertising and keeps your saved history for longer.
Free
Free
always
Every calculator, every result, no limits. Advertising pays for it.
- All 34 calculators, unlimited use
- Full step-by-step working on every result
- Print and PDF export
- Saved calculation history with a free account
- Supported by advertising
Ad-free Monthly
₹199
per month
No advertising anywhere on the site. Cancel whenever you like.
- No advertising anywhere on Calculix
- Lighter, faster pages
- Extended calculation history
- Cancel any time — access runs to the end of the period
Best value
Ad-free Yearly
₹1,999
per year
₹167 a month
· saves 16%
A full year ad-free for roughly the cost of nine months.
- Everything in Monthly
- Around 24% below paying month to month
- Priority replies to support email
- Cancel any time
Do I need an account to use the calculators?
No. Every calculator works fully without signing in. An account only adds saved history, and a membership only removes ads.
What exactly does a membership change?
Advertising disappears across the whole site, pages load lighter, and your calculation history is kept longer. The calculations themselves are identical.
Can I cancel?
Yes, any time from your dashboard. Cancelling stops future renewals; you keep ad-free access until the period you already paid for ends.
Is my payment information stored here?
No. Payments are handled by the gateway. We store only the plan, the amount and the gateway's reference number — never card details.