Terms & Conditions

By accessing or using OneCalcApp you agree to these terms. If you do not agree, please discontinue use of the service.

OneCalcApp calculators and converters are free for personal and commercial use. OneCalcApp AI uses prepaid credits purchased through one-time payments. Credits do not auto-renew and have no scheduled expiry. AI charges depend on provider-reported input, cached-input, cache-write and output tokens, including reasoning, rounded up once per request. A temporary reservation is made up to your selected request budget; the final charge cannot exceed it. Unused reserved credits are returned after settlement. Missing provider usage stays pending review. Stopping the display does not cancel a request already generating. Credit purchases are for use within OneCalcApp and are not cash. You may not resell, scrape at scale, or attempt to disrupt the availability of the service.

Calculators follow published IEC and IS standard formulas, but results are indicative. Any design derived from OneCalcApp must be reviewed and certified by a qualified engineer before implementation.

The OneCalcApp name, logo, interface and original content are owned by OneCalcApp. Results you generate from your own inputs belong to you.

We aim for high availability but do not guarantee uninterrupted service. Features may change or be withdrawn without notice.

OneCalcApp is provided "as is" without warranties of any kind. We are not liable for any loss arising from use of, or reliance on, results produced by the platform.

Questions about these terms can be sent to onecalcapp@gmail.com. We aim to respond within five business days, and material changes to these terms are published on this page with an updated revision date.