The Crimson Bench

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The Operator's Toolkit

The calculators our Ivy League-educated operators reach for — free to use. Put in your numbers, get an instant read on the metric that matters. Then grab the full model when you need to go deeper.

Toolkit Pro

Need to model the whole business? Full simulators — 5-year projections, dilution, growth & valuation.

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Browse by category

MarketingView all →

Marketing · Free Tool

ROAS Calculator

Is your ad spend actually making money?

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Marketing · Free Tool

Conversion Funnel Calculator

Turn traffic and a conversion rate into revenue.

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Marketing · Free Tool

Email Marketing ROI Calculator

What your list is actually worth per send.

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Marketing · Free Tool

CPM / CPC / CPA Calculator

Break any ad campaign down to what each result costs.

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Marketing · Free Tool

Blended vs. Paid CAC Calculator

Separate what paid really costs from your free wins.

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Marketing · Free Tool

Break-Even ROAS Calculator

The minimum ROAS before an ad makes a cent.

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Marketing · Free Tool

LTV:CAC by Channel

Which acquisition channel actually pays off?

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Marketing · Free Tool

Funnel Drop-Off Analyzer

Find the exact stage leaking your customers.

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Marketing · Free Tool

Cost-Per-Lead → CAC

Turn a lead cost into a true customer cost.

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Marketing · Free Tool

Email List Value Calculator

What your subscriber list is worth per year.

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Marketing · Free Tool

Content ROI Calculator

Does a piece of content actually pay back?

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Marketing · Free Tool

SEO Keyword Value Calculator

What ranking for a keyword is actually worth.

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Marketing · Free Tool

Influencer ROI Calculator

Is that sponsorship worth the fee?

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Marketing · Free Tool

Abandoned Cart Recovery Value

The revenue hiding in your abandoned carts.

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Marketing · Free Tool

A/B Test Revenue Lift

What a conversion win is worth in dollars.

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Marketing · Free Tool

Webinar ROI Calculator

Model a webinar funnel end to end.

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Marketing · Free Tool

Referral Program ROI

Does your refer-a-friend reward pay for itself?

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Marketing · Free Tool

Social Media Post Value

Put a dollar figure on a single post.

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Marketing · Free Tool

Ad Budget Allocator

Split budget between two channels by ROAS.

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Marketing · Free Tool

Lead Magnet Value Calculator

What each download is really worth.

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Marketing · Free Tool

CPM Reach Planner

How far a budget goes at a given CPM.

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Marketing · Free Tool

Branded Search Value

The hidden revenue in people Googling your name.

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Marketing · Free Tool

Max CAC & Ad Spend Planner

How much you can afford to spend to grow.

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EntrepreneurView all →

Entrepreneur · Free Tool

Break-Even Timeline Calculator

The month you finally stop losing money.

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Entrepreneur · Free Tool

Startup Exit Payout Calculator

What your equity is really worth at exit — after dilution.

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Entrepreneur · Free Tool

Profit First Allocator

Split revenue into profit, pay, tax, and opex — on purpose.

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Entrepreneur · Free Tool

Runway Extender

See how cuts and revenue buy you more months.

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Entrepreneur · Free Tool

MVP Payback Calculator

How long until your build pays for itself.

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Entrepreneur · Free Tool

Seed Round Sizing Calculator

How much to raise — enough for milestones, not vanity.

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Entrepreneur · Free Tool

Founder Salary Calculator

What you can actually pay yourself right now.

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Entrepreneur · Free Tool

SaaS Magic Number

Should you spend more on sales — or fix efficiency first?

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Entrepreneur · Free Tool

SaaS Quick Ratio

Is your growth outrunning your churn?

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Entrepreneur · Free Tool

Months to $1M ARR

At your growth rate, when do you cross $1M ARR?

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Entrepreneur · Free Tool

Customer Concentration Risk

How exposed are you if one client leaves?

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Entrepreneur · Free Tool

Gross Profit Per Employee

A blunt, honest read on team efficiency.

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Entrepreneur · Free Tool

Inventory Turnover Calculator

How fast your stock becomes cash.

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Entrepreneur · Free Tool

SAFE / Note Conversion Calculator

See the ownership your SAFE converts into.

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Entrepreneur · Free Tool

Pricing Tiers Revenue Modeler

Model revenue and ARPU across three plans.

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Entrepreneur · Free Tool

Equity Comp (Options) Calculator

What a stock-option grant is really worth.

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Entrepreneur · Free Tool

Revenue Goal → Customers Needed

Turn a revenue goal into a customer count.

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Entrepreneur · Free Tool

Business Value (SDE) Estimator

A quick, buyer-style valuation of a small business.

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Entrepreneur · Free Tool

Subscription vs. One-Time Value

Which pricing model earns more per customer?

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Real EstateView all →

Real Estate · Free Tool

Cap Rate Calculator

The yield a property throws off, price aside.

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Real Estate · Free Tool

Cash-on-Cash Return Calculator

The return on the actual cash you put in.

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Real Estate · Free Tool

NOI Calculator

The property’s true operating income.

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Real Estate · Free Tool

DSCR Calculator

Will the property cover its own loan?

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Real Estate · Free Tool

Rental Cash Flow Calculator

What a rental actually puts in your pocket.

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Real Estate · Free Tool

Fix & Flip ROI Calculator

The real profit on a flip, after every cost.

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Real Estate · Free Tool

BRRRR Cash-Left-In Calculator

How much cash you leave in after the refinance.

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Real Estate · Free Tool

The 1% Rule Calculator

A 10-second screen for rental deals.

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Real Estate · Free Tool

Rent vs. Buy Calculator

Is buying actually cheaper than renting?

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Real Estate · Free Tool

Gross Rent Multiplier

A fast price-to-rent sanity check.

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Real Estate · Free Tool

Seller Net Proceeds Calculator

What you actually walk away with at closing.

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Real Estate · Free Tool

Max Offer (70% Rule) Calculator

The most you should pay on a flip.

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Real Estate · Free Tool

Break-Even Occupancy Calculator

How full a rental must be to cover costs.

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Real Estate · Free Tool

Property Appreciation Projector

What a property could be worth down the road.

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Real Estate · Free Tool

Short-Term vs. Long-Term Rental

Airbnb or a lease — which nets more?

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Real Estate · Free Tool

Price Per Square Foot

Compare properties on an even footing.

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Real Estate · Free Tool

Down Payment Savings Timeline

When you’ll have the down payment saved.

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Real Estate · Free Tool

Loan-to-Value (LTV) Calculator

How much of the property the bank owns.

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Real Estate · Free Tool

Cash Flow Per Door

Normalize a portfolio down to one number.

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HealthcareView all →

Healthcare · Free Tool

Patient Lifetime Value

What a patient is worth to the practice over time.

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Healthcare · Free Tool

No-Show Cost Calculator

The real annual cost of empty appointment slots.

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Healthcare · Free Tool

Provider Productivity Calculator

Revenue a single provider generates.

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Healthcare · Free Tool

Patient Acquisition ROI

Is your marketing bringing in profitable patients?

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Healthcare · Free Tool

Net Collections Calculator

What you actually collect vs. what you bill.

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Healthcare · Free Tool

Break-Even Visits Calculator

How many visits cover your overhead.

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Healthcare · Free Tool

Days in A/R Calculator

How long your money sits in receivables.

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Healthcare · Free Tool

Procedure Margin Calculator

Which procedures actually make money.

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Healthcare · Free Tool

Chair / Room Utilization

How full your treatment capacity really is.

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Healthcare · Free Tool

Membership Practice Revenue (DPC)

Model recurring revenue for a membership practice.

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Healthcare · Free Tool

Denied Claims Cost Calculator

The revenue at risk in claim denials.

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Healthcare · Free Tool

Staffing Cost Ratio

Is your team cost in a healthy range?

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Healthcare · Free Tool

Telehealth vs. In-Person Margin

Which visit type nets more per slot?

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Healthcare · Free Tool

Patient Panel Capacity

Can you take on more patients — or are you full?

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Healthcare · Free Tool

Clinic Revenue Per Sq Ft

How hard your real estate works.

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E-CommerceView all →

The Crimson Bench · Est. 2002 · Founded in New York City

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