The Basic Formula for Email Open Rate — and Why It’s No Longer Enough If you came here asking “what is the formula for open rate email?”, here’s the textbook answer: divide unique opens by delivered emails and multiply by…
Churn rate measures the percentage of customers or revenue you lose over a specific period. The core formula is: (Customers Lost During Period ÷ Customers at Start of Period) × 100. If you started January with 1,000 customers and lost…
How to Calculate Customer Lifetime Value and CAC: The Plain-English Answer If you need the shortest possible answer to ‘how to calculate customer lifetime value,’ here it is: for a subscription business, multiply average revenue per account by gross margin…
What Business Cash Flow Really Means (And Why Profit Lies) If you want to know how to calculate business cash flow, start by throwing the word “profit” out the window for a moment. Cash flow is the actual movement of…
When you ask how to calculate lease vs buy equipment, the answer is not ‘compare monthly payments.’ You must compute the after-tax present value (PV) of all cash flows for both options over an identical horizon, then adjust for residual…
How to Calculate Payback Period in Excel: The Easiest Method The fastest way to calculate payback period in Excel is to list your annual cash inflows, create a cumulative cash flow column, and use a simple SUM or IF formula…
What Break-Even Units Really Mean (and the Basic BEP Formula) If you run a business that sells anything, break-even units are the exact number of products you must sell in a period to cover all costs—no profit, no loss. The…
To calculate expected value, you weight each outcome by its probability and sum. But the real task many analysts face is how to calculate expected value of a function. If you have a random variable X and a transform g(X),…
The Manual Formula to Calculate Inflation Impact on Savings If you want to know how to calculate inflation impact on savings without a widget, use this discounting equation: real purchasing power = present savings ÷ (1 + inflation rate)years. This…
The Moment I Discovered My Net Worth Was Misleading When I first tried to calculate my net worth in 2017, I tallied my paid-off vehicle at its full Kelley Blue Book price and proudly ignored a small 401k loan I…
