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Calcimator

Quota Sampling Calculator

Calculate the number of survey responses needed from each population stratum using proportional quota sampling. Ensures your sample mirrors the population composition.

Inputs

Results

Stratum 1 Quota

500

Stratum 2 Quota350
Stratum 3 Quota100
Stratum 4 Quota50
Total Population100,000
Total Allocated1,000
How to Use This Calculator
  1. Enter your target total sample size.
  2. Define the quota strata (age groups, gender, region) and the target percentage for each.
  3. Input the number of completed interviews in each stratum so far.
  4. Review the Quota Fill Rate and the Remaining Completes Needed per stratum.
  5. Close quotas that are full and focus recruitment on underrepresented groups.

How the result changes with Total Sample Size

Total Sample SizeStratum 1 Quota
10,0015,001
35,00117,501
65,00032,500
90,00045,000

What each input means

Total Sample Size
The total number of survey responses you plan to collect across all strata.
Stratum 1 Population
Population count for stratum 1 (e.g., age 18-34 or region A). Used to calculate proportional quota.
Stratum 2 Population
Population count for stratum 2 (e.g., age 35-54 or region B).
Stratum 3 Population
Population count for stratum 3 (e.g., age 55-64 or region C). Set to 0 if unused.
Stratum 4 Population
Population count for stratum 4 (e.g., age 65+ or region D). Set to 0 if unused.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Total Sample Size = 1000, Stratum 1 Population = 50000, Stratum 2 Population = 35000, Stratum 3 Population = 10000 = 5 input(s) provided
  2. Calculate Stratum 1 Quota
    Stratum 1 Quota
    500 = 500
  3. Calculate Stratum 2 Quota
    Stratum 2 Quota
    350 = 350
  4. Calculate Stratum 3 Quota
    Stratum 3 Quota
    100 = 100

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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