Why Isn’t This Tool Free?
🕓 Last updated: 23 December 2025
This tool isn’t free because it does what free tools usually skip, it calculates the full chain of risk and gives you a testing plan.
Most free calculators output a label without showing the logic. HIVRiskReport models partner likelihood, treatment context, and what happened during sex, then turns that into a personalised report you can follow.
If you want the science behind treatment and infectiousness, read U=U and undetectable viral load. If you want test timing, read window periods. If anxiety is driving symptom scanning, read symptoms vs fear.
When fear hits, the internet is the first place we turn. Free “HIV calculators” pop up everywhere, but they are often shallow, generic, and they can leave you more anxious than before. They do not give you certainty, they give you vague guesses.
You’re here because you need clarity you can trust. This tool was built to give you exactly that, a personalised, evidence based risk report that cuts through the noise and gives you real peace of mind. If you want a broader explainer of why probability helps, see why probability brings clarity.
The Problem With Free Tools
HIV risk isn’t a yes or no question. It’s a chain of probabilities, and missing even one step makes the result meaningless. Free tools often skip the full chain. They hand you a label like “low risk” without showing the logic. That’s not reassurance, it’s roulette.
Our tool answers the three questions that actually matter:
- 1. What’s the chance your partner had HIV to begin with?
- 2. If they did, what’s the chance they could pass it on?
- 3. If they could, what’s the chance it reached you?
Anything less than all three steps is incomplete. That’s why we built this differently. If you want to see the assessment flow, start here: confidential risk assessment.
How It Works
Step 1: Was Your Partner Likely Positive?
We calculate this using hard data, not guesses. Country prevalence, group level risk, and partner behaviours feed into the starting point. If you want the full guide to how inputs are used, see: HIV risk calculator guide.
Step 2: Could They Even Transmit?
This is where most calculators break down. Even if someone is positive, they may not be infectious. Antiretroviral treatment can make the virus undetectable, which means untransmittable (U=U). Our tool accounts for this by using treatment context, so you get a smarter estimate instead of a fear driven one. Read the full breakdown here: viral load and U=U.
Step 3: What Happened During Sex
Different acts mean different risks. We layer in specifics such as vaginal vs anal, condom use, presence of blood, and more. If your concern is oral sex, start here: HIV through oral sex. If your concern is female to male vaginal risk, read: female to male transmission. If circumcision status is part of your worry, read: circumcision and HIV risk.
The Side By Side Difference
| Feature | Free Tools | HIVRiskReport |
|---|---|---|
| Method | Labels only | Step by step probability model |
| Inputs Considered | 3 to 5 | 13 plus |
| Understands ART (U=U)? | No | Yes, built on treatment context |
| Factors Like Blood or Wounds? | No | Yes |
| Output | “Low risk” label | 6 page personalised report |
| Privacy | Unclear | Private by design |
Why It’s Worth Paying For
What you’re buying isn’t just a number. It’s relief, clarity, and a private roadmap for your next steps. Here’s what’s inside:
- Customised science: Risk is calculated using your country context, your encounter, and your role.
- Total privacy: You are not the product. The report is built for you, not for ad targeting.
- Clear next steps: Testing timelines and plain language explanations so you know what to do next, see window periods.
- Support for anxious spirals: If symptoms are driving panic, see symptoms vs fear.
You’ve spent enough energy worrying. It’s time to take control with an answer you can trust.