Sample Size Calculator
Your Inputs
Your Estimated Results
Scenario:
Expected revenue from projects you never knew existed Same bid volume — more of it converted through earlier, better-qualified pursuit
- In-House Total
- per year
- Replaceable Cost
- per year
- Net Savings
- per year
- Return Multiple
- vs tracker cost
- Hours Saved
- per year
- FTE Equivalent
- per year
- Value Saved
- per year
- Return Multiple
- vs tracker cost
- Hours Wasted
- per year
- Recovered Cost
- per year
- Selling Weeks Recovered
- of BD time
- Return Multiple
- vs tracker cost
- Manual Cost
- per year
- Net Savings
- per year
- Hours Freed
- per year
- Savings Multiple
- vs tracker cost
- Cost per Proposal
- hours × rate + external
- Annual Bid Spend
- per year
- Cost per Win
- spend ÷ wins
- Spend on Losses
- per year
- Improved Cost/Win
- after win rate lift
- Sources Needed
- for full coverage
- Coverage
- of target sources
- Unseen Projects
- per year
- Unseen Value
- per year
- Addressable Value
- market size
- Pursuable Bids
- at your pursuit rate
- Expected Wins
- as new entrant
- Expected Revenue
- per year
- Info-Driven Losses
- deals per year
- Defendable Losses
- deals per year
- Defended Revenue
- per year
- Defended Profit
- per year
- Return Multiple
- vs tracker cost
- Bid Score
- weighted score
- Recommendation
- automated decision
- Win Probability
- based on score
- Expected Value
- profit - bid cost
- EV Ratio
- expected value vs cost
What this means
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Adjust the inputs above to calculate your results.
Three steps to your number
Enter your population size
The total number of people in your target population.
Choose your confidence level
Common choices: 90%, 95%, or 99%.
Set your margin of error
How much precision do you need? Common choices: 3%, 5%, or 10%.
Enter expected proportion
Use 50% for maximum sample size, or your best estimate.
Who uses this calculator
Safety surveys
plan statistically valid safety culture assessments.
Quality control
determine inspection sample sizes for construction materials.
Customer satisfaction
survey project owners and contractors.
Your questions, answered
Stop losing deals you never knew existed
See live projects in your sectors and countries
Announced, planned and tendering right now — with a free trial of the Global Project Tracker, or get a 20-minute walkthrough with data relevant to your business.
Trusted by 500+ companies · 150+ countries · 200+ sectors · Updated daily