Support CalcLumen
CalcLumen is a small, independent project. Every calculator is free, with no signup and no paywall. If one saved you time and you’d like to say thanks, you can leave a crypto tip below — but there are free ways to help too, and they matter just as much.
Send only the listed asset on the listed network. A transfer on the wrong network is irreversible and the funds are lost. Always send a small test amount first. Do notuse OKX “X Layer” — ordinary wallets cannot send to it.
TRON (TRC-20)
Send: USDT
TTYkkhf3Pbc3Vw8h8wt2Y1uEGfxmT1TcL6Solana (SPL)
Send: SOL, USDT
He8CCQNSxyeGTiBG1EwxjbfNnQJndYB58jY15fBezyLXEthereum (ERC-20)
Send: ETH, USDT, USDC
0x80cda3f917b5cb07217bacc5d81605d406cbcfb8Free ways to help
No money needed — a link or a share helps people find us and means a lot to a small independent project.
Link to us from your site
<a href="https://calclumen.com">CalcLumen — free calculators</a>Where your support goes
Tips go straight back into the site: hosting and domain costs, building new calculators, and keeping everything fast, free and free of signups. There’s no team and no investors — it’s a one-person project, so even a small tip is genuinely appreciated.
Good to know
- Tips are completely voluntary. They don’t unlock features or remove ads — everything on the site is already free for everyone.
- Crypto transfers are irreversible. Double-check the network and address, and send a small test amount first.
- Send only the asset shown for each network. A transfer on the wrong network cannot be recovered.
- In some countries, gifting or receiving crypto can be a taxable event. If in doubt, check your local rules.