Rock Paper Scissors Odds Calculator
Free online rock paper scissors odds 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.
中文版:剪刀石头布概率计算器
原理:剪刀石头布是循环占优的零和博弈——没有纯策略均衡,唯一均衡是混合策略。当赢收益 a 与输损失 b 不对称时,均衡仍是三种手势等概率(各 1/3),但博弈值 v = (b − a)/3 会偏向收益占优的一方。
步骤:① 输入赢收益 a 与输损失 b;② 点击计算;③ 读出三种手势的均衡概率与期望收益。
示例:标准对称情形 a = 1、b = 1 时 v = 0,公平游戏;若输要赔 2、赢只得 1(a = 2、b = 1),则 v = -0.333333333333,每局期望亏 1/3——别玩这种盘口。
注意事项:等概率均衡对任何 a、b 都成立(循环结构使然),不对称盘口改变的是期望值而非混合比例;人类对手并非随机机,针对对手习惯的剥削性策略短期有效但会被反剥削;本工具假设对手按均衡出招。
相关:零和博弈计算器给出 2×2 情形的混合概率公式;纳什均衡计算器解释无差异条件;期望值计算器是混合策略期望收益的底层工具。
How to use the Rock Paper Scissors Odds 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 Rock Paper Scissors Odds Calculator free?
Yes — all math 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 2026-10-05
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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