Multiplicative Inverse Modulo Calculator
Free online multiplicative inverse modulo calculator. Enter your values and get instant results with the formula, step-by-step working, a worked example and FAQs — everything runs locally in your browser on Calcton, no signup required.
逆元存在的充要条件是 gcd(a, m) = 1；当 m 为素数时，逆元恒存在且等于 a^(m−2) mod m（费马小定理口径），与扩展欧几里得结果一致。
How to use the Multiplicative Inverse Modulo Calculator
- Fill in the inputs with your own numbers — every field shows what it expects.
- The result updates instantly as you type; no "Calculate" click needed.
- Read the result card for the main figure, the step-by-step formula, and practical notes.
Frequently asked questions
Is the Multiplicative Inverse Modulo Calculator free?
Yes — all study & exams calculators on Calcton are free, with no sign-up required. Your inputs are processed in your browser and never sent to a server.
Is there a Chinese version of this tool?
Yes. Use the Chinese version link above — it is the same calculator with the interface in Simplified Chinese.
References
Formulas and benchmarks used by this calculator follow these published sources.
KevinContent LeadCalcton Editorial Team · Last updated 2026-06-06
Kevin maintains Calcton's formula verification and content: every calculator cites the standard it implements, worked examples are recomputed programmatically, and health benchmarks follow WHO and international guidelines.
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