商业与专业

Free A/B Test Sample Size Calculator — determine the minimum sample size per variation needed to detect a statistically significant result, estimate test duration, and analyze post-test significance with p-value, z-score, and confidence intervals.

Free Annual Recurring Revenue (ARR) calculator for SaaS businesses. Calculate ARR from MRR, customer counts, pricing tiers, or ARR components. Includes waterfall bridge, 12-month projections, NRR, CLV, and valuation multiples.

Free Customer Acquisition Cost (CAC) calculator — compute how much it costs to acquire each new customer, measure LTV:CAC ratio, calculate payback period, and compare your performance against industry benchmarks for SaaS, e-commerce, and more.

Free customer churn rate calculator — compute churn %, retention rate, customer lifetime, revenue impact, net revenue churn, and multi-year projections. Ideal for SaaS, subscription businesses, and e-commerce.

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免费招聘成本计算器 — 计算每次招聘的总招聘成本，分拆内部和外部成本，与SHRM数据进行基准比较，并预测年度招聘预算。

Free Cost Per Click (CPC) Calculator — calculate CPC, campaign ROI, ROAS, CPA, and CPM/CTR metrics. Compare your CPC against platform and industry benchmarks.

Free Cost Per Mille (CPM) calculator — solve for CPM, total ad spend, or impressions instantly. Includes platform benchmarks, CPC/CTR metrics, budget planner, and ROI tracking for Google, Facebook, LinkedIn, TikTok, and more.

Free Critical Path Method (CPM) calculator with Gantt chart — compute ES, EF, LS, LF, Total Float, Free Float, and the critical path for any project network.

免费周期时间计算器 — 计算制造周期时间、节拍时间、生产率和过程效率。支持基本、净生产时间和质量调整公式。

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免费薪资基准计算器 — 将您的薪酬与市场百分位数（P10–P90）进行比较，计算您的薪酬比率，生成薪资区间，并查看50多个职位在各行业和美国各地的总薪酬估算。

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免费总薪酬计算器 — 添加基本工资、奖金、健康福利、401(k) 配对、带薪休假价值、股权和其他福利，瞬间揭示您的真实薪酬价值。

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