BizLearn — Learn the metrics, then run your numbers

These articles explain the same KPIs the calculators use. Each page has a definition, a worked example, a quiz, and the formula as implemented on this site.

Every business

Gross Profit Margin (GPM) — It tells you how many cents you keep from each dollar sold before paying rent, payroll, or other overhead.
Net Profit Margin (NPM) — It is the share of every sales dollar that actually becomes profit after all bills are paid.
Cash Runway — It answers how long your cash lasts if money keeps leaving the business at today's pace.
Gross Profit — It is how many dollars are left after paying for what you sold, before rent, payroll, and other overhead.
Annual Break-Even Revenue — It is how much you need to sell in a year just to cover all operating expenses — zero profit, zero loss.
Net Monthly Cash Flow — It is whether more cash came into your accounts than left this month — the bank balance story, not the P&L story.
Monthly Burn Rate — It is how much cash your business loses per month when spending beats deposits — the speed you are going through money.
Annual Run Rate — It is a quick guess at yearly revenue based on what hit the bank this month — useful when you do not have a full year of books yet.

Food & Beverage

Food Cost Percentage — It shows what fraction of your menu sales went to buy the ingredients and products you served.
RevPASH (Revenue Per Available Seat-Hour) — It tells you how much money each seat earns for every hour you are open.
Average Check Value — It is how much each guest spends on average per visit — your ticket size before tips.
Daily Break-Even Revenue — It is how much you need to ring up today just to stop losing money — before profit.
Daily Waste Cost — It is how much money you throw in the trash each day from spoilage, over-prep, and plate waste.

Retail & E-Commerce

Retail Gross Margin — It is the share of each sale you keep after paying for the product itself — before rent, payroll, and marketing.
Sales Per Square Foot — It tells you how much money each square foot of your store earns in a year — a core metric for judging whether your rent makes sense.
Inventory Turnover — It tells you how fast product moves through your store — high turnover means cash is not stuck on shelves.
Retail Return Leakage Rate — It measures how much of your sales come back as refunds or store credit — dead weight on margin.
Average Order Value (AOV) — It is the average dollar amount a customer spends per order — online or in-store.
Foot Traffic Conversion Rate — It measures how many people who walk in actually buy something.
Dead Stock Trapped Capital — It is how much cash is stuck in inventory that is not selling at full price — clearance and slow movers.

Residential Rental

Operating Expense Ratio (Rental) — It shows how much of every rent dollar goes to running the property — taxes, insurance, maintenance, and management.
Capitalization Rate (Cap Rate) — It shows how much income a property produces relative to its price — like a yield on a bond, but for real estate.
Rent Collection Rate — It answers what share of rent you actually banked versus what tenants owed on the lease.
Vacancy Cost — It is how much money empty units cost you — rent you did not collect because nobody was paying.
Cash Flow Per Unit — It is how much spendable cash each rental door produces after the mortgage is paid.
Cash Reserves Runway (Rental) — It is how many months your landlord reserve fund lasts if rent stopped but mortgage and upkeep still had to be paid.
Cash-on-Cash Return — It is the annual return on the actual dollars you put into the deal — down payment, closing costs, and rehab.
Gross Rent Multiplier (GRM) — It is how many years of gross rent it would take to equal the purchase price — a quick price sanity check.

Short-Term Rental

Short-Term Rental Occupancy Rate — It measures how often your calendar is filled — empty nights are lost revenue you can never recover.
STR Cleaning Cost % — It shows how much of each booking dollar pays for cleaners, laundry, and supplies between guests.
Average Daily Rate (ADR) — It is the average price you actually earned per booked night — not your listed rate before discounts.
Revenue Per Available Room/Night (RevPAR) — It blends your nightly rate and occupancy into one number — revenue per night you could have rented.
Cost Per Booked Night (STR) — It is what each booked stay costs you to operate — cleaning, supplies, utilities, and share of fixed costs.

Fix & Flip

70% Rule (Max Purchase Price) — It is a back-of-napkin check: if you pay more than this number, you probably will not have enough spread after rehab and holding costs.
Projected Gross Profit (Fix & Flip) — It is the spread you expect to walk away with before taxes and your own labor — the reason you take the flip risk.
Daily Holding Cost — It is what you pay every day just to own the flip property before it sells — the clock that eats profit.
Days to Capital Exhaustion (Fix & Flip) — It tells you how many days until flip cash runs out at the current burn from interest, insurance, and utilities.
Cumulative Holding Cost — It is the total carrying cost piled up while you own the flip — the clock cost of not being sold yet.
Maximum Purchase Price (70% Rule) — It is the highest price you should pay for a flip if you want room for rehab, carry, and profit.

Professional & Wellness

Appointment Utilization Rate — It measures how full your providers' calendars are — empty slots are capacity you already paid for but did not sell.
Client Retention Rate — It measures how many customers come back after their first visit — repeat clients are cheaper than constantly finding new ones.
No-Show Bleed — It puts a dollar figure on revenue lost when clients book but do not show up.
Average Service Value — It is the average ticket per visit — what each client appointment is worth to the practice.
Revenue Per Service Hour — It is how much revenue each hour of actual service time generates — not admin or gap time.
Revenue Per Station — It is how much each physical station — chair, room, or bay — earns in the period.

Trades & Home Services

Job Gross Margin (Trades) — It shows how much of each job is left after the direct cost to do the work — before shop rent, trucks, and office payroll.
Labor Efficiency (Trades) — It measures how much of payroll time actually lands on paying jobs versus travel, waiting, or shop time.
Effective Hourly Rate (Trades) — It is what you actually earned per hour on the job — including drive time, estimates, and callbacks.
Average Job Value — It is the average ticket size of a completed service call or install — what each job is worth.
Monthly Cancel Bleed — It is how much money walked out the door because jobs were canceled after you scheduled them.

Agriculture & Farming

Input-to-Revenue Ratio (Farm) — It shows how much of every sales dollar went right back into growing the crop or livestock.
Gross Margin Per Acre — It shows how much of each acre's revenue is left after seed, fertilizer, fuel, and other variable costs — before land payments and equipment.
Off-Season Cash Runway — It answers how many months you can survive the slow season before the next crop payment or livestock sale.
Revenue Per Acre — It shows how much each acre earned before expenses — a land productivity scorecard.
Break-Even Price Per Unit — It is the minimum price you need per bushel, head, or unit to cover all costs — zero profit, zero loss.
Cost of Production Per Unit — It is your all-in cost to produce one bushel, animal, or unit — every input and expense spread across yield.

Manufacturing

Manufacturing Scrap Rate — It measures how much of what you make ends up in the scrap bin instead of shipping to customers.
Manufacturing Job Gross Margin — It is the markup on a production job after the materials and shop labor that touch that job — before overhead and scrap surprises.
Machine Utilization Rate — It measures how much of the time your expensive equipment is actually making parts versus sitting idle.
First Pass Yield (FPY) — It measures how often parts come out right the first time — rework is hidden factory cost.
Scrap Cost — It is how much money you threw away in bad parts, bad runs, or rework scrap this period.
Idle Capital Drag — It is money you spend owning and financing equipment that is not cutting, molding, or running.

Freelance & Agency

Billable Utilization Rate — It shows what share of your team's time clients actually pay for versus internal meetings, sales, and admin.
Revenue Concentration (Top Client Share) — It shows how much of your income depends on one customer — high concentration means one lost contract can crater the business.
Effective Hourly Rate — It is what you actually earn per hour after counting sales calls, admin, and scope creep — not just your posted billable rate.
ARR Run Rate — It is a quick annual revenue snapshot from what is hitting the bank each month — useful for agencies with retainers.
Monthly Recurring Revenue (MRR) — It is the subscription-style income you can count on each month from retainers — not one-off projects.
Customer Acquisition Cost (CAC) — It is what you spent in ads, outreach, and sales time to land each new client.
Annual Recurring Revenue (ARR) from Retainers — It is your retainer income expressed as an annual number — the subscription layer of your agency.

Transportation

Profit Per Mile — It is the bottom-line money you keep for each mile the truck rolls — the core unit economics of trucking.
Fuel Cost as % of Revenue — It shows how much of every revenue dollar goes to diesel — when this creeps up, profit per mile usually falls unless rates rise.
Loaded Miles Percentage — It shows how often your truck moves freight versus running empty — deadhead miles burn fuel without pay.
Revenue Per Mile (RPM) — It is what you earn for every mile the truck moves — the top line of per-mile unit economics.
Cost Per Mile (CPM) — It is what it costs you to move the truck one mile — fuel, maintenance, driver pay, and more.
Truck Utilization Percentage — It measures how often your truck is out earning versus sitting in the yard.

Construction

Bid-to-Win Ratio — It measures how often your estimates turn into signed contracts — too low means wasted estimating effort; too high can mean you are too cheap.
Job Cost Variance % — It shows whether a project is running over or under budget — positive means over estimate.
Days of Work in Backlog — It estimates how many days of work you already sold before needing the next contract win.
Overhead Recovery Percentage (Construction) — It shows whether the overhead you built into bids is enough to pay for estimators, PMs, and the yard — not just field crews.

Lending ratios

Debt Service Coverage Ratio (DSCR) — It shows whether the business earns enough to comfortably pay its loan bills.
Debt-to-Income Ratio (DTI) — It shows how much of your personal paycheck already goes to debt before you take on a business loan.
Current Ratio — It answers whether you have enough cash and near-cash assets to pay bills due in the next year.
Loan-to-Cost (LTC) — It shows how much of your flip or construction project the lender is willing to fund versus what you pay out of pocket.
Quick Ratio (Acid-Test) — It is a stricter liquidity test that ignores inventory because inventory can be slow to sell.