rabFlagship
Cost Estimating / Beginner
Building a Cost Estimate from Drawings
From working drawings to a number you can defend in front of a client.
Tiara Maheswari
- Lessons
- 27
- Time
- 2h 49m
- Rating
- 4.9
- Learners
- 36.2K
J-BIKSkill track
Cost Estimating
From drawings to quantities, unit rates and an estimate you can defend.
Courses
3
Lessons
63
Material
6h 45m
Pace
3 weeks at 20 minutes a day
Result
Cost Estimating Certificate
Track route
From foundation to roof.
Every floor stands on the one before it. Its height matches the length of its course, so you can see which part is heaviest.
- Roof: track exam
Cost Estimating Certificate
40 questions, 60 minutes, pass at 75 percent.
Start here
By the end you'll be able to
- 1Build a complete list of work from a drawing set.
- 2Make a quantity back-up that traces to its sheet and revision.
- 3Read an analysis and match its unit to the BoQ.
In this track
Courses in this track.
Chapter 1 of every course is free. With Pro, everything opens and your progress counts toward the track.
1
2
3
- vol
Cost Estimating / Intermediate
Quantity Take-off from Drawings
Taking quantities off drawings in a way someone else can check.
Tiara Maheswari- Lessons
- 18
- Time
- 1h 59m
- Rating
- 4.8
- Learners
- 12.9K
- hsp
Cost Estimating / Intermediate
Unit Rates and Unit Price Analysis
From coefficients and shop prices to a unit rate that makes sense.
Tiara Maheswari- Lessons
- 18
- Time
- 1h 57m
- Rating
- 4.7
- Learners
- 9.4K
Exam and certificate
What you take home.
A numbered certificate in your name that you can download and share. It isn't a professional competency certificate, but it's proof you can show.
Time
60 minutes
Questions
40
Pass mark
75 percent
Retake
7 days later
- 1Work through every course in this track.
- 2Take the exam when you're ready, there's no timetable.
- 3Pass, and the certificate appears in your account.
AcademyCertificate of completion
Awarded to
Laras Kinanti
who passed the timed track exam and completed every course in
Cost Estimating Certificate
Tiara Maheswari
Chief examiner
- Number
- DA-BIK-2026-04817
- Exam
- 40 questions, 60 min
- Score
- 86 / 100
- Date
- 14 October 2026
Questions that come up
About exams and certificates.
01What's the difference between a skill track and a career track?
A skill track covers one subject end to end, such as Core Details, and closes with an exam and a certificate. A career track pulls courses from several subjects in the order one role needs them, such as Studio-Ready Drafter.
02What is the track exam like?
40 questions in 60 minutes: multiple choice, calculations and reading drawings. You pass at 75 percent. The clock keeps running once you start, so set aside a quiet hour.
03What if I don't pass?
You can retake it after 7 days. Your results show which parts are weak, so use the time to redo those chapters.
04What does the certificate count as?
It's proof you passed a Detarva Academy track exam. It isn't a professional competency certificate or a licence to practise. Many people use it in their portfolio when applying, and how much it counts is up to the employer.
05Can I share it online or print it?
Yes. Each certificate has its own number and can be downloaded as a PDF or shared through a link.
J-BIKThe first floor is free
Start on floor one.
Chapter 1 of each course is open to you. Go on with Pro if it suits you.