diff --git a/lib/web3/eth.js b/lib/web3/eth.js
index 87a3a4c..625f5c0 100644
--- a/lib/web3/eth.js
+++ b/lib/web3/eth.js
@@ -102,7 +102,7 @@ var getBlock = new Method({
     name: 'getBlock', 
     call: blockCall,
     params: 2,
-    inputFormatter: [utils.toHex, function (val) { return !!val; }],
+    inputFormatter: [formatters.inputBlockNumberFormatter, function (val) { return !!val; }],
     outputFormatter: formatters.outputBlockFormatter
 });
 
@@ -110,7 +110,7 @@ var getUncle = new Method({
     name: 'getUncle',
     call: uncleCall,
     params: 2,
-    inputFormatter: [utils.toHex, utils.toHex],
+    inputFormatter: [formatters.inputBlockNumberFormatter, utils.toHex],
     outputFormatter: formatters.outputBlockFormatter,
 
 });
@@ -148,7 +148,7 @@ var getTransactionFromBlock = new Method({
     name: 'getTransactionFromBlock',
     call: transactionFromBlockCall,
     params: 2,
-    inputFormatter: [utils.toHex, utils.toHex],
+    inputFormatter: [formatters.inputBlockNumberFormatter, utils.toHex],
     outputFormatter: formatters.outputTransactionFormatter
 });