Business Valuation Calculator
Enter investment amount, equity percentage, and annual revenue to instantly calculate implied pre-money valuation, post-money valuation, revenue multiple, and founder equity retained — the same deal math used in every Shark Tank pitch and investor negotiation.
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Want to understand the valuation formula in depth?
Step-by-step
What this calculator does
This business valuation calculator computes the key numbers behind any equity-based investment deal. Given an investment amount and equity percentage, it derives the implied pre-money valuation — the estimated worth of the company before the investment is added. It then calculates post-money valuation, the revenue multiple (how many times annual revenue the valuation represents), and the equity percentage the founder retains after the deal.
These are the exact calculations investors perform the moment a founder makes their ask — whether in a Shark Tank pitch room, an angel meeting, or a seed round term sheet discussion.
Formulas used
Post-money Valuation = Pre-money + Investment
Revenue Multiple = Pre-money Valuation ÷ Annual Revenue
Founder Retains = 100% − Equity %
Investor's post-money ownership = Investment ÷ Post-money Valuation
How to use
- Select a preset or enter your own investment amount and equity percentage.
- Enter your trailing 12-month annual revenue. Use 0 if pre-revenue.
- Optionally enter gross margin — it appears in the interpretation to give context.
- Click Calculate — the deal waterfall and metric cards update instantly.
- Read the "What this means" card — it tells you how investors are likely to view the multiple.
Example calculations
Pre-money: $1,000,000
Revenue multiple: 5×
Founder retains: 90%
Pre-money: $1,333,333
Revenue multiple: 2.7×
Founder retains: 85%
Pre-money: $1,000,000
Revenue multiple: 12.5× (on $80k rev)
Founder retains: 75%
Pre-money: $5,000,000
Revenue multiple: 16.7×
Founder retains: 90%
What revenue multiple is defensible?
The revenue multiple tells investors how much they're paying relative to what the business currently generates. There are no universal rules, but these ranges reflect typical Shark Tank and angel investor expectations by business type:
- Physical consumer product: 1–3× is typical. 5× requires strong growth and repeat purchase data.
- DTC / ecommerce: 3–5× is common with strong retention metrics.
- Food & beverage: 1–3× due to thin margins and distribution complexity.
- SaaS / subscription: 5–15× is defensible with low churn and recurring revenue.
- Service / agency: 0.5–2× due to limited scalability without headcount.
A multiple outside your industry norm is not automatically a dealbreaker — but you need a compelling story to back it up: growth rate, gross margin, customer lifetime value, or a clear path to a large exit.
FAQ
How is the implied valuation calculated?
Implied pre-money valuation = Investment ÷ (Equity % ÷ 100). If an investor puts in $100,000 for 10%, the implied valuation is $100,000 ÷ 0.10 = $1,000,000. This is the company's estimated worth before the investment is added.
What is the difference between pre-money and post-money valuation?
Pre-money valuation is the company's value before receiving the investment. Post-money valuation = pre-money + investment. When an investor says they'll invest at a "$1M valuation," they typically mean pre-money. The investor's actual ownership percentage is calculated against the post-money value: Investment ÷ Post-money.
What does the revenue multiple tell me?
The revenue multiple (also called price-to-sales ratio) shows how many times annual revenue your valuation represents. A 5× multiple means investors are paying $5 for every $1 of current annual revenue. Higher multiples require stronger justification — faster growth, higher margins, or recurring revenue streams.
What if my business has no revenue yet?
Enter 0 for annual revenue. The calculator will show "Pre-revenue" for the multiple. Pre-revenue valuations are based entirely on narrative: IP, patents, team, letters of intent, or market size. These deals typically close at lower valuations or with alternative structures like convertible notes or royalties.
How is "founder retains" calculated?
Founder retains = 100% − Equity % offered. If you give up 15%, you retain 85% — before any future dilution from additional funding rounds. Each subsequent round will dilute this further, so most founders try to keep early rounds under 20–25% equity total.
Can I use this calculator for a counter-offer scenario?
Yes. Enter the counter-offer investment and equity numbers to instantly see the new implied valuation. Comparing the original ask vs the counter-offer in two quick calculations shows exactly how far apart the two valuations are — which is the core of any deal negotiation.
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Disclaimer: This calculator provides simplified deal math for planning and educational purposes only. Actual business valuations depend on many additional factors including discounted cash flow projections, comparable transactions, intellectual property, team quality, market conditions, and investor risk appetite. This tool does not constitute financial or investment advice — consult a licensed financial advisor or M&A professional before making funding decisions.