diff --git a/lib/http/server.js b/lib/http/server.js
index f2ff9332..23fb3d97 100644
--- a/lib/http/server.js
+++ b/lib/http/server.js
@@ -279,8 +279,9 @@ HTTPServer.prototype.initRouter = function initRouter() {
     }
 
     const height = await this.chain.getHeight(hash);
+    const confirmations = this.chain.height - height;
 
-    res.send(200, block.getJSON(this.network, view, height));
+    res.send(200, block.getJSON(this.network, view, height, confirmations));
   });
 
   // Mempool snapshot
diff --git a/lib/primitives/block.js b/lib/primitives/block.js
index ae9c8918..9be79213 100644
--- a/lib/primitives/block.js
+++ b/lib/primitives/block.js
@@ -575,11 +575,12 @@ Block.prototype.toJSON = function toJSON() {
  * @returns {Object}
  */
 
-Block.prototype.getJSON = function getJSON(network, view, height) {
+Block.prototype.getJSON = function getJSON(network, view, height, confirmations) {
   network = Network.get(network);
   return {
     hash: this.rhash(),
     height: height,
+    confirmations: confirmations,
     version: this.version,
     prevBlock: util.revHex(this.prevBlock),
     merkleRoot: util.revHex(this.merkleRoot),