The working formula
Room price per night × nights + meals allowance per person per day × people × days + intercity transport + local transfers + activities + contingency. Use THB throughout. A quote is only valid under the supplier’s actual terms.
What this excludes
International flights, insurance, entry requirements, personal shopping and medical expenses are not automatically included. Add each separately if relevant. We have not collected a current representative price dataset.
Make it useful
Use the calculator in My trip with your own figures. Save the assumptions in your booking notes. Compare the effect of removing a transfer before reducing every meal allowance.