Frequently asked questions
Straight answers on transfer ratios, minimums, and the GrabCoins transition, covering all five Thai reward programs plus general points to miles questions.
4 K Points convert to 1 Royal Orchid Plus mile (a 4:1 ratio). The minimum transfer is 20,000 K Points for 5,000 ROP miles. This excludes KBank Titanium, business, and corporate cards. Source: Kasikornbank K Point to ROP.
The standard Special Point rate is 3,000 points = 1,000 ROP miles (3:1), with a minimum of 3,000 points. Platinum Leader and Visa Infinite cardholders get a preferential Platinum Point rate of 2,000 points = 1,000 miles (2:1), with a minimum of 2,000 points. Source: Thai Airways — Bangkok Bank partner page.
Processing typically takes around three business days. Plan ahead of any award availability window you are trying to catch. This is slower than KTC's instant in app transfer.
4 KTC FOREVER Points convert to 1 Cathay Pacific Asia Mile (4:1), transferred instantly via the KTC Mobile app. FOREVER Points can also move to roughly ten other airline programs. Source: KTC — Travel with Points.
No. KTC periodically runs time limited promotions, such as 100 bonus Asia Miles per 5,000 points transferred during a specific window (for example, a promotion covering February to April 2026). Do not build your baseline math around a promotional rate that is scheduled to end.
1 TruePoint = 1 AirAsia BIG Point (1:1), with a minimum transfer of 1,000 points, via BIG Xchange in the AirAsia app or a BIG Points Code redeemed in the TrueID app. Source: TrueYou to AirAsia BIG transfer guide.
TruePoints are earned at roughly 1 point per 25 THB spent on True mobile, internet, and TV services. Source: True Digital Group — TrueYou.
GrabRewards was rebranded to GrabCoins across Thailand and six other Southeast Asian markets around November to December 2025. GrabCoins centers on instant in app discounts (roughly 20 GrabCoins per 1 THB) rather than the older travel rewards catalog. Source: Grab — GrabCoins 2025 announcement.
There is no guaranteed current live rate. The last confirmed GrabRewards to KrisFlyer rate before the 2025 rebrand was roughly 13,000 points to 1,000 KrisFlyer miles (13:1), after a 30% devaluation in September 2023. Because the GrabCoins catalog is in transition, always check the Rewards or Xchange section of the Grab app for current options before relying on this figure. Sources: Grab Thailand — GrabCoins, MileLion — GrabRewards devaluation.
No. A historical GrabRewards to ROP path (1,600 points = 100 ROP miles, 16:1) was part of a 2019 campaign that expired on 31 December 2019. It is not a current option and is mentioned only for historical context.
TrueYou TruePoint has the most favorable stated ratio (1:1 into AirAsia BIG Points), but AirAsia BIG Points carry lower per point redemption value than full service carrier miles. The best program depends on both the ratio and the destination airline's mile value for your specific flight. See the comparison table.
It depends on the specific redemption. The SiamMiles calculator's Quick Estimate mode compares your program's baseline mile value against its in app cash or discount value. Exact Redemption mode goes further, calculating your real value per mile for a specific flight you have found.
Generally, no. Transfers between rewards programs and airline mile programs are usually irreversible, so confirm the live rate and check real award seat availability before transferring.
Take the cash price of the flight, subtract taxes and fees charged on the award booking, then divide by the number of miles required: (cash price − taxes and fees) ÷ miles. This is the standard method used throughout the travel rewards industry to judge a redemption.
No. Royal Orchid Plus is a Star Alliance program, so miles can be redeemed across the wider Star Alliance network, not only on Thai Airways operated flights.
AirAsia BIG Points are a budget carrier currency, generally valued around ฿0.07 per point on AirAsia flights and closer to ฿0.06 per point on other airlines. That is structurally lower than full service programs like Asia Miles or KrisFlyer, which can be worth multiples more per point on premium cabin redemptions. Source: Malaysia4U — AirAsia BIG Points review.
No, the calculator is free to use. The site may show Google AdSense advertising to help cover running costs. See the Privacy Policy and Affiliate Disclosure for details.
No. SiamMiles is an independent, unofficial resource. It is not affiliated with, endorsed by, or sponsored by Kasikornbank, Bangkok Bank, KTC, True Digital Group, AirAsia, Grab, Thai Airways, Cathay Pacific, or Singapore Airlines. Always verify current rates directly with each program before transferring.