laymath
Playful teal, mint, and orange mathematical sculptures
BIG IDEAS. NO MATH DEGREE REQUIRED.

Lay Math.
Make the numbers
make sense.

Less head-scratching. More “oh, I get it.”
Explore the math behind your business, one little
what-if at a time.

Real-life tools Plain-English explanations Your own figures, any currency
A different way to look at things.
THE WHAT-IF SANDBOXLive

How much profit has the business kept?

Last balance, plus profit, minus what you paid out.

$
$
$
Type in your own figures — these are only a starting point.
HERE’S THE BIGGER PICTURE
Retained earnings at the end
$150,000

Kept $30,000 this period · paid out 33.3% of profit.

No sign-up. No spreadsheets. Just a little clarity.Your figures. Real math.
YOUR BUSINESS, MINUS THE GUESSWORK

Big questions. Useful little tools.

See all calculators
REVENUE & GROWTH

What if my business grows?

See what a few more customers or a different price could mean for your recurring revenue.

MRR · ARR
BUSINESS VALUE

What’s my business worth?

Explore earnings, revenue, and asset-based valuations. Get a starting point, not a crystal ball.

SDE · EBITDA · MULTIPLES
PRICE & PERSPECTIVE

Is that price the whole story?

Put a company’s share price next to its earnings. Make sense of the ratio behind the number.

PRICE / EARNINGS
NET ASSET VALUE

What’s really underneath?

Subtract what’s owed from what’s owned, then see it per share. The math behind funds and holdings.

NAV · PER SHARE
GOING PUBLIC

How much does an IPO raise?

Shares offered × offer price. See the headline number and what it does and doesn’t mean.

IPO · OFFER PRICE
EVERYDAY MATH

Is 25% off a good deal?

Percentages trip everyone up. See exactly what you save and what you pay.

PERCENT · DISCOUNTS
OWNERSHIP

How much do I keep if I sell shares?

Raising money means new shares. See exactly how your ownership percentage changes.

DILUTION · EQUITY
PERSONAL FINANCE

What’s my personal net worth?

Add up what you own, subtract what you owe. The single number that sums up your finances.

ASSETS − DEBTS
LIFE EVENTS

What will the big day cost?

Weddings, christenings, funerals: guests × per-person cost, plus fixed costs and a cushion.

GUESTS · VENUE · BUFFER
Browse every calculator by topic
LOST IN THE LETTERS?

Business speaks in acronyms.
We speak human.

Unpack the terms you hear. Without the textbook.

HARD MATH. EVERYDAY CLARITY.

Math isn’t just for math people.

It’s for the person building something, pricing something, or wondering “what if?”
Lay Math turns intimidating ideas into things you can see, change, and understand.