GradLedgerQuick answer: One homeschool high school credit is usually 120 to 180 hours of work in a subject. The traditional benchmark is 120 hours, about 40 minutes a day over a 36-week school year. Many families use 150 to 180 hours for lab sciences. A half credit (one semester) is half of that: 60 to 90 hours.
Where the 120-hour standard comes from
US high schools have long measured credit with the Carnegie unit: 120 hours of instruction in one subject over a school year. Homeschool families often use the same benchmark when they award credit by time, then adjust for the course: more hours for lab sciences, which add lab work and write-ups, and sometimes fewer for courses completed through a full textbook.
Time per credit at common standards
For a 36-week school year, 5 days a week:
| Hours per credit | Per week | Per school day | Half credit |
|---|---|---|---|
| 120 hours | 3.3 hours | 40 minutes | 60 hours |
| 135 hours | 3.8 hours | 45 minutes | 67.5 hours |
| 150 hours | 4.2 hours | 50 minutes | 75 hours |
| 180 hours | 5 hours | 60 minutes | 90 hours |
Hours to credits
Credits = hours completed ÷ hours per credit. Most transcripts show credits in quarters or halves, so round down to the nearest 0.25 or 0.5:
| Hours logged | at 120 h/credit | at 150 h/credit | at 180 h/credit |
|---|---|---|---|
| 30 hours | 0.25 | 0.0 | 0.0 |
| 60 hours | 0.5 | 0.25 | 0.25 |
| 90 hours | 0.75 | 0.5 | 0.5 |
| 120 hours | 1.0 | 0.75 | 0.5 |
| 150 hours | 1.25 | 1.0 | 0.75 |
| 180 hours | 1.5 | 1.0 | 1.0 |
Three ways homeschool families award credit
- By hours. Log time and award 1 credit per 120 to 180 hours. Good for electives, hands-on courses and anything without a textbook. The hours tracker adds up time per course.
- By curriculum completed. Finishing a full high school textbook or curriculum (most of the chapters, tests and assignments) usually counts as 1 credit, however long it took.
- By mastery. Award credit when the student shows they've learned the material, for example by passing a standardized exam such as a CLEP or AP exam.
Pick a method for each course, use it consistently, and note it if you write course descriptions. Your state or umbrella school may have its own rules, so check them.
What counts as hours
Count the time the student actually spends on the subject: lessons, reading, writing, labs, practice, projects, field trips and co-op or online classes. Breaks and unrelated screen time don't count. For an English course, reading the assigned novels counts; for a PE credit, practice and games count.
Frequently asked questions
How many hours is a half credit in homeschool?
Half of a full credit: 60 hours at the 120-hour standard, 75 at 150 hours, or 90 at 180 hours. A one-semester course is usually a half credit.
Do I have to count hours to give credit?
Usually not. Many families award credit for completing a full high school curriculum or for demonstrated mastery instead. Hours are most useful for electives and courses without a textbook. Check your state's homeschool law in case it sets record-keeping rules.
How many hours a day is one credit?
At 120 hours per credit and 36 weeks of 5 days, about 40 minutes a day. At 150 hours it's about 50 minutes, and at 180 hours an hour a day.
How many credits is a lab science?
Usually 1 credit, like other full-year courses, but many families expect 150 to 180 hours because of lab work. You can set any hours-per-credit standard in the calculator.
Can a student earn more than one credit in a year for a subject?
Yes, if they complete the work: 240 hours of logged art at 120 hours per credit could become 2 credits, for example two separate courses such as Drawing and Painting.
More homeschool record tools
Last updated · Written by the MiniTools team. GradLedger is general information and a record-keeping tool, not legal advice. Homeschool laws and college requirements vary; check your state's rules and each college's admissions requirements.