FinCalcHub Marketing

A/B Test Significance Calculator

Enter visitors and conversions for your control (A) and variant (B) to compare conversion rates, relative uplift, the z-score and an estimated confidence level from a two-proportion z-test. A sample-size check tells you whether the test has enough traffic to trust.

Crypto-to-Fiat Reference Converter

CoinGecko reference prices for BTC, ETH and SOL; cached or fallback values may appear if live data is unavailable. CoinGecko

Connecting…
BTC
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Live Equivalent Conversion

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Live market prices

Bitcoin (BTC)

Digital Gold

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Ethereum (ETH)

Smart Contracts

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Solana (SOL)

High-Performance

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Price updates about every 30 seconds · CoinGecko reference data

💡 What this tool does: Convert Bitcoin, Ethereum, or Solana amounts to one of 30 fiat currencies using CoinGecko reference prices. The page requests crypto-price data through FinCalcHub’s endpoint; cached or fallback values may appear when live data is unavailable. The separate site-wide currency selector uses preset conversion factors, not live foreign-exchange rates. A displayed crypto value is an estimate, not an exchange execution quote.

📊 Daily Media Buyer RoAS Planner

Enter campaign revenue, ad spend, gross margin, and campaign length to estimate ROAS, a margin-based break-even reference, and daily revenue and spend.

Active RoAS

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Break-Even RoAS

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Revenue − Ad Spend

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Daily Ad Spend

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Daily Revenue

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RoAS Status Indicator

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💡 What this tool does: Use revenue, ad spend, gross margin, and campaign days to calculate ROAS, break-even ROAS (1 ÷ the entered gross margin), daily averages, and revenue minus ad spend. Revenue minus ad spend is not full net profit. The break-even reference excludes costs not reflected in the entered margin, so treat it as an estimate—not a scale recommendation.

📝 Client Invoice Hours & Bench Tracker

Estimate a gross billable amount and take-home amount from hourly rate, hours, a platform-fee percentage, and an entered withholding rate.

Net Earnings

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Gross Invoice

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Platform Cut

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Tax Withheld

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Earnings Breakdown

Net 0%
Platform 0%
Tax 0%

💡 What this tool does: Enter hourly rate, hours, platform-fee percentage, and withholding percentage to estimate gross invoice value, deductions, and the remaining amount. The withholding is only the rate you enter; this tool does not prepare an invoice or determine your actual tax liability.

💥 A/B Split-Test Significance Engine

Enter visitors and conversions for a control and a variant to compare conversion rates, relative uplift, a two-proportion Z-test confidence estimate, and a sample-size heuristic.

Version A (Control)

Conv. Rate: —

Version B (Variant)

Conv. Rate: —

Statistical Confidence Score

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Z-Score: —

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Relative Uplift

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Sample Adequacy

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💡 What this tool does: This two-proportion Z-test compares the entered conversion counts and rates. Its confidence score and sample-size flag are estimates under simplified assumptions; they do not account for experiment design, repeated checking, or audience differences. A conventional confidence threshold is not proof that a variant will perform better in the future.

Compound Interest Calculator

Estimate future value from an initial amount, annual rate, compounding frequency, time, and an optional monthly contribution. The projection assumes a constant rate.

Future Value

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Total Invested: —

Interest Earned

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Effective Growth

0%

Breakdown

Principal 0%
Contributions 0%
Interest 0%

💡 What this tool does: Enter principal, annual rate, compounding frequency, time, and an optional monthly contribution to estimate future value and separate contributions from modeled growth. The calculation assumes the rate remains constant and contributions continue as entered; actual returns can differ.

SIP Investment Planner

Estimate the future value of regular monthly contributions using an assumed annual return and an investment period; the result is a projection, not a promise.

Maturity Value

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Total Invested

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Wealth Gained

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Invested vs Returns

Invested 0%
Returns 0%

💡 What this tool does: Enter monthly contribution, expected annual return, and term to estimate maturity value, total contributions, and modeled growth. The formula assumes a constant return and contributions at the beginning of each month; market returns vary, so treat the output as an illustration.

Income Tax Calculator

Estimate tax from monthly income and filer category using the calculator’s built-in progressive slabs. The schedule is fixed; verify that its rates and currency assumptions match your situation and the current tax year.

Annual Tax Liability

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Monthly Deduction: —

Annual Income

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Effective Rate

0%

Take-Home / Month

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💡 What this tool does: The calculator annualizes monthly income and estimates annual tax, effective rate, average monthly deduction, and take-home amount for the selected category. It uses hard-coded bands and rates rather than a jurisdiction- or tax-year-aware table; changing the site-wide currency display does not convert the thresholds. Check current official rules before relying on the estimate.

Savings Goal Calculator

Estimate a monthly contribution toward a savings target using the time horizon, current savings, and an assumed annual return.

Monthly Savings Needed

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Total You'll Save

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Interest Earned

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💡 What this tool does: Enter a target, time horizon, current savings, and expected return to estimate the monthly deposit, total modeled contributions, and modeled interest. The result assumes a steady return and is a planning illustration, not a guaranteed outcome.

Retirement Planning Calculator

Estimate a retirement corpus and monthly saving amount from current age, retirement age, expenses, years in retirement, inflation, and an assumed return.

Retirement Corpus Needed

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Monthly expenses at retirement: —

Monthly Savings

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Years to Retire

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💡 What this tool does: Projects monthly expenses at retirement using the entered inflation rate, estimates a corpus for the chosen retirement period and return assumption, and estimates a monthly saving amount before retirement. It uses simplified constant-rate assumptions; actual inflation, investment returns, and spending may differ.

Profit Margin Calculator

Compare cost price with selling price to calculate the difference, profit margin, and markup. Other operating costs are not included unless reflected in the entered cost.

Profit

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Margin

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Markup

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Breakdown

Cost 67%
Profit 33%

💡 What this tool does: The calculator uses only the entered cost and selling prices to calculate the difference, margin, and markup. It does not model overhead, taxes, shipping, returns, or break-even volume unless those costs are included in the entered cost. A 50% markup on cost equals a 33.3% margin on price.

💼 Freelancer Hourly Rate Calculator

Estimate an hourly and daily rate from an income goal, expenses, billable hours, a tax-rate assumption, vacation days, and a target margin.

Hourly Rate

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Daily Rate

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Annual Revenue

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Working Days / Year

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Min Revenue / Month

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💡 What this tool does: Enter desired monthly income, business expenses, billable hours, tax rate, paid vacation days, and a margin target to estimate an hourly rate, daily rate, and revenue target. The result uses the calculator’s built-in workday assumptions and does not account for every possible cost or tax rule.

🚀 SaaS CAC & LTV ROI Engine

Estimate CAC, simplified LTV, LTV:CAC, ROI, payback, and margin metrics from acquisition spend, new customers, monthly revenue, operating cost, and customer lifespan.

This field is not used by the current calculation; LTV uses the entered customer lifespan.

CAC

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LTV

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LTV : CAC

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ROI

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Payback Period

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Key Metrics

Net Revenue / Cust / Mo: —

Gross Margin: —

Annual Revenue / Cust: —

Break-Even Customers: —

💡 What this tool does: Enter marketing spend, new customers, monthly revenue per customer, average lifespan, and monthly operating cost per customer to estimate CAC, LTV, LTV:CAC, ROI, payback, gross margin, and related metrics. LTV is calculated as monthly net revenue multiplied by the entered lifespan; the churn field is not used. Benchmarks are context-dependent, and this simplified result is not a forecast.

🛒 E-Commerce Net Profit & Markup Suite

Estimate per-unit profitability after entered product cost, shipping, platform and payment fee percentages, and ad spend. Costs not included in those inputs are not included in the result.

Net Profit / Unit

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Net Margin

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True Markup

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Total Costs / Unit

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Per-Unit Status

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Cost Breakdown Per Unit

Product Cost—
Shipping—
Platform Fee—
Payment Gateway—
Ad Spend—
Net Profit—

💡 What this tool does: Enter selling price, product cost, shipping, platform-fee percentage, payment-fee percentage, and ad spend per unit. The calculator returns modeled per-unit profit, margin, markup, costs, and a positive/negative profitability status; it does not calculate break-even unit volume. Unentered costs—such as returns, fixed transaction charges, tax, or overhead—are excluded.

Calculator processing: Most calculator formulas run in your browser, and outputs are estimates based on the values you enter. Results may omit real-world costs, changing rates, or tax rules; review each tool’s assumptions before relying on them. PDF and CSV exports are generated in-browser; XLSX export uses the locally loaded SheetJS file.

How to use the A/B Test calculator

  1. Enter visitors and conversions for Version A (control).
  2. Enter visitors and conversions for Version B (variant).
  3. Read the conversion rates, relative uplift and confidence score.
  4. Check the sample adequacy flag before acting on the result.

Formula

Conversion rate = conversions ÷ visitors, for each version.

Pooled rate p̂ = (conversions A + conversions B) ÷ (visitors A + visitors B)

Standard error = √( p̂ × (1 − p̂) × (1/visitors A + 1/visitors B) )

z = |rate B − rate A| ÷ standard error, and confidence = 2 × Φ(z) − 1, where Φ is the normal distribution function.

The sample-size flag uses the rule of thumb n ≈ 16 × p̂(1 − p̂) ÷ (rate difference)² per version.

Worked example

Version A: 5,000 visitors, 200 conversions (4.00%). Version B: 5,000 visitors, 250 conversions (5.00%).

Confidence above 95% is the conventional threshold, yet the sample-size flag says this test is still underpowered for a difference this size. Neither proves that B will keep winning in future.

Frequently asked questions

What does 95% confidence mean in an A/B test?

Roughly: if there were truly no difference between A and B, you would see a gap this large less than 5% of the time by chance. It is not a 95% probability that B is better.

How many visitors do I need for an A/B test?

It depends on your baseline conversion rate and the smallest lift you care about. Smaller lifts and lower conversion rates need far more traffic. This tool shows a rule-of-thumb check; use a proper power calculation for important tests.

Can I stop a test as soon as it reaches 95%?

Not safely. Checking repeatedly and stopping at the first significant result inflates false positives. Decide the sample size or duration beforehand and run through full weekly cycles.

What is the difference between statistical and practical significance?

A tiny uplift can be statistically significant with huge traffic yet too small to matter commercially. Always compare the uplift with the cost and effort of shipping the change.

What if my result is below 95%?

The data does not show a reliable difference yet. You can keep collecting data to the planned sample size, or accept that the change makes no measurable difference.

Is this calculator two-sided?

Yes. The confidence score reflects a two-sided test, so it looks for a difference in either direction.

Estimates only, based on the values and assumptions you enter. Not financial, tax or legal advice.

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