The result is months until or after the STI interval: 12 months, or 3 months with two or more new partners in 6 months or injection-drug risk. In the first example the result is 15 months overdue.
The calculator is not a swab result and does not diagnose an infection. The result is months until or after the STI interval: 12 months, or 3 months with two or more new partners in 6 months or injection-drug risk.
Enter data and click Calculate.
The calculator uses the numbers you enter. The result is months until or after the STI interval: 12 months, or 3 months with two or more new partners in 6 months or injection-drug risk. In the first example the result is 15 months overdue.
The five form fields are New partners without protection/PrEP, Symptom concern, Vaccination gap, Years since last STI testing, and Injection drug risk / needle sharing. Months to STI test means: This is the main result on this page. In the first example it is 15 months overdue. New partners without protection/PrEP means: The first form field. It enters the formula or sits beside the result. The result is months until or after the STI interval: 12 months, or 3 months with two or more new partners in 6 months or injection-drug risk. Symptom concern means: The second form field. The calculator is not a swab result and does not diagnose an infection.
The second example gives in 7 months. The third example gives 45 months overdue. The result is months until or after the STI interval: 12 months, or 3 months with two or more new partners in 6 months or injection-drug risk. In the first example the result is 15 months overdue.
The calculator is not a swab result and does not diagnose an infection.
Enter 2, 2, 3, 1.5, 0, then click Calculate. A comma in 12.5 is read the same way as a period. Fields on a 0-10 scale are notes and are not the primary result unless this page formula says so.
The result is months until or after the STI interval: 12 months, or 3 months with two or more new partners in 6 months or injection-drug risk.
In the first example the result is 15 months overdue. The result is months until or after the STI interval: 12 months, or 3 months with two or more new partners in 6 months or injection-drug risk.
15 months overdue
The result is months until or after the STI interval: 12 months, or 3 months with two or more new partners in 6 months or injection-drug risk. In the first example the result is 15 months overdue.
in 7 months
The result is months until or after the STI interval: 12 months, or 3 months with two or more new partners in 6 months or injection-drug risk. In the second example the result is in 7 months.
45 months overdue
The result is months until or after the STI interval: 12 months, or 3 months with two or more new partners in 6 months or injection-drug risk. In the third example the result is 45 months overdue.
In the first example the result is 15 months overdue. The result is months until or after the STI interval: 12 months, or 3 months with two or more new partners in 6 months or injection-drug risk.
With the second set of fields the result is in 7 months.
With the third set of fields the result is 45 months overdue.
The result is months until or after the STI interval: 12 months, or 3 months with two or more new partners in 6 months or injection-drug risk.
The calculator is not a swab result and does not diagnose an infection.
This is the main result on this page. In the first example it is 15 months overdue. The first form field. It enters the formula or sits beside the result. The result is months until or after the STI interval: 12 months, or 3 months with two or more new partners in 6 months or injection-drug risk. The second form field. The calculator is not a swab result and does not diagnose an infection.
Yes. 12.5 and 12,5 are read the same way.
No. Fields on a 0-10 scale are notes, unless this page formula counts marked items from them. The primary result comes from this page formula.
12 months, or 3 months with two or more new partners in 6 months or injection-drug risk.
No. The calculator does not diagnose an infection and does not replace a lab test.
Two or more new partners in 6 months, or marked injection-drug risk. The other fields sit beside the months.
No. The interval is counted from the test date, not from how you feel.
Anyone who wants months until the next STI test. It is not for emergencies.
The result is months until or after the STI interval: 12 months, or 3 months with two or more new partners in 6 months or injection-drug risk. The calculator is not a swab result and does not diagnose an infection.
Page updated in 2026.
