South African drink presets · R5 per calculation
Example values are pre-filled. Replace them with your own details before paying. This is an educational estimate, not proof that it is safe to drive.
Do not use this estimate to decide whether to drive. If you have been drinking, arrange a sober ride.
Optional contributions start from R1 and are separate from the R5 calculation fee. Choose a secure payment method below.
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Important legal disclaimer: This is an educational estimate, not legal or medical proof of fitness to drive. Actual results vary with absorption, food, medication, health and testing method. In South Africa, the statutory threshold for ordinary drivers is 0.05 g per 100 ml of blood (and 0.24 mg per 1,000 ml of breath); professional drivers have a lower threshold. Never drive after drinking.
ZAR BAC is a South African BAC calculator that provides an educational estimate of alcohol levels and clearance time for R5 per calculation. It is designed to promote informed, safer decisions—not to determine whether it is safe or legal to drive.
No. ZAR BAC provides an educational estimate only. Alcohol absorption and clearance vary between people, so it cannot prove that you are fit or legally permitted to drive.
For ordinary drivers, the statutory blood-alcohol threshold is 0.05 g per 100 ml of blood. Professional drivers have a lower threshold of 0.02 g per 100 ml.
No result guarantees that driving is safe or lawful. If you have been drinking, do not drive—choose a sober driver, taxi, or ride service instead.
For ordinary drivers, the National Road Traffic Act sets a blood-alcohol threshold of 0.05 grams per 100 millilitres, with a lower 0.02 g per 100 ml threshold for professional drivers. A reading below a legal threshold is not a guarantee that driving is safe or lawful in every circumstance.
Alcohol clearance varies substantially from person to person. This tool uses a simplified Widmark estimate and an average elimination rate of 0.015% BAC per hour for educational illustration only. Water, coffee and cold showers do not speed up alcohol elimination.
Effective 17 September 2026
By using ZAR BAC, you agree to these Terms of Use. If you do not agree, please do not use the site.
ZAR BAC provides a simplified, educational estimate of blood alcohol concentration and alcohol-clearance time. It is not medical, legal, safety, or professional advice. The results are not evidence of fitness to drive, impairment, or compliance with any law.
Alcohol can affect people differently, and results may be inaccurate because of factors including absorption, food, medication, health, timing, body composition, and measurement error. If you have consumed alcohol, do not drive or operate machinery. Arrange a sober driver, taxi, or ride service instead.
You are responsible for the information you enter and for decisions you make. You may use ZAR BAC for lawful, personal purposes only. You may not misuse, interfere with, reverse engineer, or attempt to disrupt the site.
Calculations cost R5 each, paid through Paystack before the estimate is shown. Optional donations are separate from this fee, are voluntary, and do not purchase a calculation, endorsement, or guarantee. Bank-transfer details and payment methods may change. If you submit a supporter shout-out, you confirm that the information is yours to share and, where you tick the consent box, that ZAR BAC may feature your name, town or city, and message on social media.
The site may link to or use third-party services such as payment providers, email applications, map, ride, or social platforms. Their own terms and privacy notices apply. ZAR BAC is not responsible for third-party content, availability, or transactions.
ZAR BAC is provided “as is” and may be changed, paused, or removed at any time. To the extent permitted by South African law, ZAR BAC and its operator are not liable for loss, damage, injury, or decisions arising from use of the site or reliance on an estimate.
These Terms may be updated by posting a revised version here. Continued use after an update means you accept the revised Terms. For questions, contact zarbac.mail@gmail.com.
These Terms do not limit consumer rights that cannot lawfully be excluded.